A one-million-year-old skull bearing traits associated
both with Homo erectus and, in addition, Homo sapiens has been found in the Afar region of Eritrea, and indicates that modern humans developed much earlier than previously thought.
(A) both with Homo erectus and, in addition, Homo sapiens has been found in the Afar region of Eritrea, and indicates
(B) both with Homo erectus and Homo sapiens have been found in the Afar region of Eritrea, which indicates
(C) with both Homo erectus and Homo sapiens has been found in the Afar region of Eritrea, indicating
(D) with both Homo erectus and Homo sapiens and found in the Afar region of Eritrea, indicating
(E) with both Homo erectus and Homo sapiens have been found in the Afar region of Eritrea, which indicates
A)
- Idiom: "associated both with" is incorrect. Correct form should be "associated with …".
- Idiom: Correct use of “both” is “both A and B”. It is incorrect to say “both A and, in addition, B”
- Two verbs “has been found” and “indicates” are connected using
comma + and -- this is incorrect.
- Sentence does not make sense. The sentence implies that not the fact of association but the skull itself indicates that modern humans developed much earlier than previously thought
B)
- Idiom: "associated both with" is incorrect. Correct form should be "associated with …".
- S-V disagreement: “a skull” is singular and “have been found” is plural.
- Modifier issue: “which” is modifying “Eritrea” whereas, according to the intended meaning, “which” should refer to the fact of association.
C)
Correct. Here singular subject "a skull" is referred by singular verb "has been". Idioms "associated with" and “both A and B” are used correctly. There is no incorrect modifier.
D)
- There is no main verb and the whole sentence is a fragment.
E)
- S-V disagreement: “a skull” is singular and “have been found” is plural.
- Modifier issue: “which” is modifying “Eritrea” whereas, according to the intended meaning, “which” should refer to the fact of association.
Correct answer is C.