Final answer:
Political parties play a crucial role in the process of getting on the general election ballot for a House of Representative seat by nominating candidates in primary elections.
Step-by-step explanation:
Political parties play a crucial role in the process of getting on the general election ballot for a House of Representative seat by nominating candidates in primary elections (Option C). The primary elections are held by political parties to choose their candidates for the general election. The candidates who win their party's nomination in the primary elections will then appear on the ballot as the party's official candidate for the House of Representatives.