The correct answer is C. Accept unpleasant as well as pleasant things.
The phrase “take the rough with the smooth” means to accept both the good and bad things in life. It is a reminder that life is not always easy, but that we should not let the bad things get us down. We should learn to accept the unpleasant things in life, and to focus on the positive.
Option A is incorrect because it suggests that we should only focus on the good things in life. This is not realistic, as life is full of both good and bad experiences. We need to be able to accept both in order to be truly happy.
Option B is incorrect because it suggests that we can make unpleasant things better by using pleasant words. This is not always possible, and it can be difficult to change the way we feel about something just by using different words.
Option D is incorrect because it suggests that we should try to avoid unpleasant things. This is not possible, as unpleasant things are a part of life. We need to learn to accept them, and to focus on the positive.