The answer is D.
Hope this helps! :-)
Answer:
Convex = outward, Concave = inward
Explanation:
Concave is like a cave in that it goes inward, and convex is just not concave
In the Book Death of a salesman we can infer that the person they are taking about has qualities that are beneficial for communicating and having positive relations with others. They also have some negative qualities that turn people away because they are unpleasant and not sought for.