Answer:
hypothesis.
Explanation:
Hypothesis is the assumption of something that may (or may not) be credible, verifiable, from which a conclusion is drawn. Popularly, the term is used as a synonym for speculation, chance or possibility of something happening. With this conceptualization we can understand that Olga hypothesized, since after reading a newspaper article discussing research showing that regular aerobic exercise improved one's memory performance, she wondered if lifting weights daily would have the same effect.
