Answer:
A-Holds national party conventions & run campaigns for their candidates to win
A-Host some rallies for their elections
B-Can take away votes from 2 major parties and offer another option for voters
C- Major parties tend to win over third parties which usually only gains a small percentage of votes
D-It ensures that a certain party wins before the election because of how districts are deliberately drawn. Gerrymandering eliminates any opposing electoral competition for the party in power.
Step-by-step explanation: