Answer:
While stubborn may have positive or negative connotations, obstinate is most definitely negative, because it implies a kind of hard-headed determination not to change your mind even when it might be best to rethink your position.
The answer is B: Talking on the telephone, because talking on the telephone consists of speaking, which is verbal.
C is the correct answer for this question. Guilt can hide what people want to do and prevent them from doing it ever again.
