The correct options are
B Political parties contest elections.
C Political parties shape public opinion.
D Political parties influence the lawmaking process.
The main objective of a party is to contest elections. Elections, in most democracies, are often fought between major parties or groups of parties. The parties prepare manifestos that summarise their key promises, ideas, opinions, views, or plan of action to the people. Parties play a crucial role in lawmaking and also shape public opinion by highlighting several issues. Parties also form the government, and the parties that lose elections form the opposition.