Which of the Following Are Good Strategies for Effective Communication

Which of the following are good strategies for effective communication in a stressful situation?
1) Lower your voice and speak slowly and clearly.
2) Be nonjudgmental in both verbal and nonverbal communication.
3) Do not allow an upset individual's inappropriate actions or speech to goad you into a similar response.
4) When you are uncertain whether the listener has understood you, request an answer.

A) 1 and 2 only
B) 2 and 4 only
C) 2 and 3 only
D) 1, 2, 3, and 4