Reading Comprehension

Step 1: Identify the main idea of the paragraph. The paragraph discusses a "trade-off" between productivity (from streamlined, repetitive processes) and flexibility.

Step 2: Analyze the concluding sentence's function. The sentence begins with "At the same time, however," which signals a contrast or a downside to the previously mentioned benefit (producing more at a faster rate).

Step 3: Evaluate the options based on the trade-off. Option (C) directly addresses the loss of flexibility. Streamlined, repetitive processes discourage creativity and new ideas, which is the other side of the trade-off. The other options are less directly related to the specific conflict between streamlined productivity and flexibility described in the paragraph.

Step 1: Identify the key finding in the paragraph. The crucial piece of evidence that "resolved" the question was that "chimps were observed selecting tools to carry with them in anticipation of particular difficulties."

Step 2: Interpret the meaning of this key finding. "Anticipation of particular difficulties" means the chimps were thinking ahead. They weren't just reacting to a present problem; they were preparing for a future one.

Step 3: Connect the finding to the options. Option (C) is the best summary of this finding. Imagining future situations is another way of saying they anticipate difficulties, and adapting their behavior is shown by selecting and carrying the right tools in advance.