I think it means meal! For example, with the word "postprandial", it means after eating a meal. Hope I helped! :)
The statement that best explains why ammonia is considered to be a base is bases are compounds that remove H+ from solutions.
Since ammonia reacted with water, it is a compound. When ammonia is becoming NH4, it removes H+, which makes it a base.
The answer is C, looking at a problem from the other persons's viewpoint.
Talk it out with the friend, let them know you care about them.