Probus
It is widely known that oxidants are toxic in large amounts, and our cells naturally generate their own anti-oxidants to neutralize them. Accordingly it is advised that people boost the intake of antioxidants to counter the effects of toxic "reactive oxygen species," or ROS, the elevated levels of which are connected with various cancers. However, such advice may not have any substantial medical grounds as new research shows that tumor-promoting ROS are produced at cellular energy factories called mitochondria whereas supplements and dietary antioxidants tend to accumulate at scattered distant sites in the cell not connected with mitochondria at all.
In the argument above, the two bold-face portions play which of the following roles?
(A)The first acts as evidence against the position taken by the argument; the second acts as a reason in support of the position taken by the author.
(B)The first is evidence that the argument disputes; the second is an observation that supports the main conclusion drawn by the argument
(C)The first is a conclusion that the argument as a whole disputes; the second is evidence that supports the position taken by the argument.
(D)The first is a conclusion that is disputed by the argument; the second is evidence that supports that conclusion
(E)The first is a conclusion against the position taken by the argument; the second acts as evidence in support of that position
Here is the role played by each sentence in the argument:
Context: "It is widely known that oxidants are toxic in large amounts, and our cells naturally generate their own anti-oxidants to neutralize them."
Contrary position: "
people boost the intake of antioxidants to counter the effects of toxic "reactive oxygen species," or ROS, the elevated levels of which are connected with various cancers."
Position taken by the argument/Conclusion of the argument: "such advice may not have any substantial medical grounds"
Supporting data for the position taken by the argument: "
new research shows that tumor-promoting ROS are produced at cellular energy factories called mitochondria whereas supplements and dietary antioxidants tend to accumulate at scattered distant sites in the cell not connected with mitochondria at all."
(A)The first acts as evidence against the position taken by the argument; the second acts as a reason in support of the position taken by the author.
First bold portion is not evidence. It is the position contrary to the position taken by the author.
(B)The first is evidence that the argument disputes; the second is an observation that supports the main conclusion drawn by the argument
First bold portion is not evidence. It is the position contrary to the position taken by the author.
(C)The first is a conclusion that the argument as a whole disputes; the second is evidence that supports the position taken by the argument.
Correct. First bold is contrary position. Second bold is supporting data for author's (argument's) position.
(D)The first is a conclusion that is disputed by the argument; the second is evidence that supports that conclusion
Second supports the argument's position, not the position disputed by the argument.
(E)The first is a conclusion against the position taken by the argument; the second acts as evidence in support of that position
Second supports the argument's position, not the position against the position taken by the argument.
Answer (C)