B. It increases the number of supporting votes for pending legislation.
Lobbyists work to build relationships with political allies in order to gather support for their causes. By forming alliances, lobbyists can increase the number of votes in favor of specific legislation. This strategy is effective because it helps sway lawmakers to support or vote for the proposed laws, creating a stronger influence in the legislative process. While putting pressure on lawmakers (Option A) can be part of the strategy, the primary goal is to increase the number of supportive votes (Option B).