43.
Your Answer is
Correct Answer is C
Explanation
This sentence should mean "to... is the key", so to should be used after the key, evolution has a subordinate relationship with mammals, and of should be used. C is correct.
43.
Your Answer is
Correct Answer is C
Explanation
This sentence should mean "to... is the key", so to should be used after the key, evolution has a subordinate relationship with mammals, and of should be used. C is correct.