Like the old Progressive Party, a new generation third-party called the Working Families Party (WFP) has successfully competed in specific geographies in recent years, forging opportunistic alliances with either of the major parties while building a precinct-level organization and support.

Based on this information and current election rules, which of the following is the best strategy for the WFP to influence public policy in the United States?

a) Run candidates in national elections where they can serve as the spoiler
b) Challenge the nominees of one or both major parties at their national conventions
c) Concentrate on "grass roots" campaigns in local elections lacking two-party competition
d) Run against both Republican and Democratic candidates in high-profile state or local elections