Everyone on the roller coaster, including Martha and Angie, ______ that the hot dogs, onion rings, funnel

Choose the best option A, B, C or D to complete each of the sentences from 21 to 39.

Everyone on the roller coaster, including Martha and Angie, ______ that the hot dogs, onion rings, funnel cake, and cotton candy will stay down during the twisting ride to come.