Means not personal; without reference or connection to a particular person; lacking human emotion or warmth.
a. conversation
b. impersonal
c. personal
d. interpersonal

Impersonal

Explanation:

We say something is impersonal when it does not refer to a specific person, but to people in general. Impersonality is a principle applied in law so that the public administration acts impartially before third parties, without benefiting or harming specific individuals, but always aiming at reaching the community or a broad group of citizens in an egalitarian way. This is a way of ensuring equal treatment for all citizens.

this question does't support enough resioning to answer.

"choosing is refusing" means individuals face an opportunity cost with each decision they make. economists state that every decision involves trade-offs. opportunity cost is the least desirable alternative given up as a result of a decision.