After looking at the explaining of the key, this question still puzzled me.
"Syivia:some psychologists attribute complex reasoning to reptiles,claiming that simple stimulus-response explanations of some reptiles' behaviors,such as food gathering,cannot account for the complexity of such behavior.Bust since experiments show that reptiles are incapable of making major alterations in their behavior,for example,when faced wtih significant changes in their environment,thes animals must be incapable of complex reasoning.
(A) Animals could make major changes in their behavior only if
they were capable of complex reasoning.
(B) Simple stimuls-response explanations can in principle account for all reptile behaviors.
(C) Reptile behavior appears more complex inthe field than laboratory experiments reveal it to be.
(D) If reptiles were capable of complex reasoning,they would sometimes
be able to make major changes in their behavior.
(E) Complex reasoning and responses to stimuli cannot both contribute to the same behavior."
I thought the key D maybe wrong because it can infer that if reptiles were capable of complex reasoning,they would sometimes be not
able to make major changes in their behavior according to the content of D.
I thought the key A maybe right.Longman dictionary
defined that "only if
used when sth will happen if sth else happens first but will definitely not happen if the first thing does not."
Based on A,it can said animals could not
make major changes in their behavior if they were not capable of complex reasoning.In other words,if animals are incapable of making major alterations in their behavior,the only reason is the animals incapable of complex reasoning.
Did I miss something? Thanks a lot