Most lobbyists

a. are less educated but politically astute.
b. are women.
c. have expertise in policy matters or personal relationships with legislators.
d. are corrupt.

Option(c) is correct

Explanation:

Lobbyist is the person in business field who attempts to persuade and convince legislators for their business or organization .Influence on decisions,policies or acts of the legislator is processed to receive favors from them through personal relationship, persuasion, etc.  

Other options are incorrect because they are educated, women and men both can be lobbyist and corrupt factor may or may not be present in lobbyist.Thus, the correct option is option(c).

there are no options provided but you can choose among the following gender-neutral pronouns: zir, hir, eir, vis, tem, eir.

in the normal course of maintaining a pronoun-antecedent agreement, we could have used the words his or her but since we are also required to use gender-neutral language, we need to replace it with its equivalent gender-neutral pronoun.