Answer:
a. to pool resources and increase their ability to influence public officials
Step-by-step explanation:
Special-interest group is an organization that was created in order to influence government representatives to pass a set of legislation that will be beneficial for the group. This group can achieve this by doing one of the following things:
- Gathered up man-power to create campaigns that increase the popularity of a certain government officials.
- Gathered up money to help fund advertisings/public appearances for a political candidate.
As a return to their effort, those government officials candidate will repay the special-interest group by the time they're elected to the office. That representatives will work to pass the legislations that the special-interest group wanted/