Which statement is an opinion, rather than a fact?

Question

Rigo was the first to finish the test that day, and he received the highest score.
Rigo’s algebra teacher asked him if he was interested in joining the math club.
Within a month, Rigo joined the math club and became the president.
Rigo really should have spent more time on his English homework.

Answer 1

The statement that is an opinion, rather than a fact, is: "Rigo really should have spent more time on his English homework."

This statement expresses a subjective judgment about what Rigo "should" have done, rather than stating a verified fact.