If you're trying to figure out whether a sentence is a thesis or not, use this test: Ask, "Could it be debated? Could someone disagree with what I'm saying?" If the answer is yes, you may
have a thesis
Based on this passage, which of the following sentences could be a thesis?
А
To play tennis, you need a tennis racket, a partner, a net and a ball.
B
Outdoor tennis courts may have clay, grass or hard surfaces.
С
People all around the world play tennis.
D
More adults should play tennis because it increases heart health, brain tissue and
flexibility