Answer:
A. Changing "explained" to "revealed."
Step-by-step explanation:
When we use the word "explain," we simply mean "to convey an idea clearly and carefully." By using this word, we understand the meaning of the statement, but it is not exciting. However, the word "revealed" implies that something was hidden or unknown, and that it will only be discovered now. This adds an element of excitement and suspense to the excerpt.