The correct option is B Be frank
Antonyms are words which have the opposite meaning in comparison to the other. Option B)be frank is correct as the word be frank means open, honest, and direct in speech or writing, especially when dealing with unpalatable mattersand the word simulate means imitate the appearance or character of. Both the words are opposite of each other. The other options are wrong as imitate, emulate, and reinforce mean take or follow as a model, match or surpass (a person or achievement), typically by imitation, and strengthen or support (an object or substance), especially with additional materialrespectively. The correct answer is B)be frank.