Prehistoric chimpanzee species used tools similar to those used by pre

Question

Prehistoric chimpanzee species used tools similar to those used by prehistoric humans: prehistoric tools recently found in East Africa are of a type used by both species. The area where the tools were found, however, is a savanna, and whereas there were prehistoric humans who lived in savanna habitats, prehistoric chimpanzees lived only in forests. Therefore, the tools must have been used by humans rather than chimpanzees.

Which of the following is an assumption on which the argument depends?

(A) Prehistoric humans did not carry their tools with them when they traveled from one place to another.

(B) Since the evolution of the first primates, East Africa has been predominantly savanna.

(C) Prehistoric humans never ventured into areas of the forest that were inhabited by prehistoric chimpanzees.

(D) The area where the tools were found was not a forest at the time the tools were in use.

(E) The prehistoric ancestors of modern chimpanzees were not capable of using tools more sophisticated than those found recently in East Africa.

Thabk · Answer

Premise 1:Prehistoric chimpanzee species used tools similar to those used by prehistoric humans Premise 2:prehistoric tools recently found in East Africa are of a type used by both species. The area where the tools were found, however, is a savanna, and whereas there were prehistoric humans who lived in savanna habitats, prehistoric chimpanzees lived only in forests. Conclusion: Therefore, the tools must have been used by humans rather than chimpanzees. (A) Prehistoric humans did not carry their tools with them when they traveled from one place to another. (B) Since the evolution of the first primates, East Africa has been predominantly savanna. < Doesn't affect the conclusion > (C) Prehistoric humans never ventured into areas of the forest that were inhabited by prehistoric chimpanzees. < Even if prehistoric humans once ventured in to forest , the conclusion is not affected > (D) The area where the tools were found was not a forest at the time the tools were in use. < if the area was a forest at the time tools were found ==> tools used by chimpanzees. Breaks the conclusion > (E) The prehistoric ancestors of modern chimpanzees were not capable of using tools more sophisticated than those found recently in East Africa.

law258 · Answer

D is correct. Here's why:

(A) Prehistoric humans did not carry their tools with them when they traveled from one place to another. --> we don't care

(B) Since the evolution of the first primates, East Africa has been predominantly savanna. --> not relevant

(C) Prehistoric humans never ventured into areas of the forest that were inhabited by prehistoric chimpanzees. --> not what we're looking for

(D) The area where the tools were found was not a forest at the time the tools were in use. --> cements that chimps were not in the picture; eliminates possibility for chimps and humans coexisting in the same area

(E) The prehistoric ancestors of modern chimpanzees were not capable of using tools more sophisticated than those found recently in East Africa. --> we don't care

daboo343 · Answer

Conclusion: The tools must have been used by humans rather than chimpanzees
Premise: The area where the tools were found, however, is a savanna, and whereas there were prehistoric humans who lived in savanna habitats, prehistoric chimpanzees lived only in forests.
Just think what can be the possible assumption
1) In the prehistoric times there was no forest in Savanna
2) Prehistoric Chimpanzees can never came to human habitat

Let's POE

(A)  Incorrect Prehistoric humans did not carry their tools with them when they traveled from one place to another.
 Evem if they carry tool from one place to another place. it will not help us in any way to link the premis to the conclusion

(B)  Incorrect Since the evolution of the first primates, East Africa has been predominantly savanna.

No way this this statement is helping us

(C)  Incorrect Prehistoric humans never ventured into areas of the forest that were inhabited by prehistoric chimpanzees.
Let's negate this answer option " Prehistoric humans sometimes ventured into areas of the forest that were inhabited by prehistoric chimpanzees. Here one can see negated option is not shattering the conclusion in any way.
(D) Correct  The area where the tools were found was not a forest at the time the tools were in use.
Just negate this option  "The area where the tools were found was a forest at the time the tools were in use." 
On negation negated option tells us that yes tool could be used by Chimpanzee and this negated version shatters our conclusion.
(E)  Incorrect The prehistoric ancestors of modern chimpanzees were not capable of using tools more sophisticated than those found recently in East Africa.
Irreverent to the context given
Hence    D    is correct

David nguyen · Answer

This might be true if they had carried their tools with them when trey travelled from their places to Prehisoric chimpanzee's places and left the tools there. Maybe true is incorrect. (A) is out.
 
Irrelevant.
 
This might be true only if they ventured into those area and left the tools there. Similar to (A). (C) is out.
 
This proves that Chimpanzees were not there when the tools were in use. Hang on to (D)
 
"more sophisticated": this leaves the possibilities that prehistoric chimpanzees were able to use less sophisticated tools. (E) is out.

Only D is left. D is the correct answer.

unraveled · Answer

Prehistoric chimpanzee species used tools similar to those used by prehistoric humans: prehistoric tools recently found in East Africa are of a type used by both species. The area where the tools were found, however, is a savanna, and whereas there were prehistoric humans who lived in savanna habitats, prehistoric chimpanzees lived only in forests. Therefore, the tools must have been used by humans rather than chimpanzees.

Which of the following is an assumption on which the argument depends?

(A)  Prehistoric humans did not carry their tools with them  when they traveled from one place to another. - WRONG. It's not about Humans but chimpanzees.

(B) Since the evolution of the first primates,  East Africa has been predominantly savanna . - WRONG. It's about that specific area.

(C) Prehistoric humans  never ventured into areas of the forest  that were inhabited by prehistoric chimpanzees. - WRONG. Again like A this too makes a similar mistake.

(D) The  area  where the tools were found  was not a forest at the time the tools were in use . - CORRECT. If it had been then passage makws no sense.

(E) The prehistoric ancestors of modern chimpanzees  were not capable of using tools  more sophisticated than those found recently in East Africa. - WRONG. Not necessarily true.

Answer D.

VerbalBot · Answer

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Prehistoric chimpanzee species used tools similar to those used by pre

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Prehistoric chimpanzee species used tools similar to those used by pre

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