Correct Answer: E
Explanation:
To answer the question, you have to follow the logical flow of the ideas in the sentence. A few key words reveal that logic:
First the introductory word After tells you that the information at the beginning of the sentence is going to affect what comes later. The word After also gives an order to the events in the sentence.
Second the word revise tells you that something is going to change. It is going to change after the events described at the beginning of the sentence. So the events at the beginning really cause the change.
Finally the end of the sentence – her earlier opinion that these particular primates were always ---- animals – tells you what is changing. The word filling the blank should convey a meaning you would have to revise after seeing the animals fight. Peaceful is the only such word among the five choices.
| Inquisitive: | inclined to ask many questions or seek information; eager to learn |