Respuesta :
The answer is B: trying to lift something that is extremely heavy.
Although, as can be seen above, the word grimace has many connotations, one of its main connotations is to express pain. Evidently, if a person is trying to lift something that is extremely heavy, it means that the person finds that object to be weighty, therefore, that person will very likely grimace in show of pain because of the effort being implemented.