To communicate constructively during tough times, one should:
a. avoid judgment and blame
b. avoid sharing your thoughts
c. avoid sharing your feelings
d. avoid the other person entirely

If you avoid sharing your feelings and thoughts, then it will not be an effective communication, rather the other opinion will prevail, and your opinion or knowledge will not be taken into account.

The same holds for avoiding the person altogether.

The best answer is therefore to a. Avoid judgment and blame