Which words in paragraph 2 of “How Secret Messages Tipped the Scales” help the reader understand the meaning of the word opted?

Which words in paragraph 2 of “How Secret Messages Tipped the Scales” help the reader understand the meaning of the word opted?

Decided to change

Strategy of learning

Achieve this advantage

Had good reason

Decided to change and had good reason

there is only one right answer

Decided to change

To understand the meaning of the word "opted" in paragraph 2 of "How Secret Messages Tipped the Scales," we can look at the surrounding words and phrases. The key words that help the reader understand the meaning of "opted" are "decided to change," "strategy of learning," "achieve this advantage," and "had good reason." These words suggest that "opted" means making a deliberate choice or decision to change a strategy in order to gain an advantage, based on good reasons or rationale.