"Mailing advertisements to the public" is a form of indirect lobbying.
Answer: Option C
Step-by-step explanation:
Grassroots or indirect lobbying, in which lobsters aim to achieve the legislature and change in the decision-making process. Direct lobbying in colloquial use is most likely to refer to direct contacts with lawmakers and administrators that aim to influence public policy.
Although indirect lobbying is actually more likely than legislators or administrators to identify attempts to influence electorates. For an instance: an action warning urging recipients to notify their representatives about an outstanding bill or join a coalition meeting to help plan a grassroots advocacy message that tackles an outstanding bill.