The correct answer is B. A political party is to get its members elected into political office
Step-by-step explanation:
A political party is a type of organization with a common ideology and position in terms of politics and that is created to get people of the party elected and therefore influencing politics. Because of this, political parties often promote certain political ideas and have a major role in elections. On the other hand, an interest group aims at opposing or supporting the general opinion or a policy through campaigns, lobbyings, polls, etc but not to prevent government making policy but just oppose specific policies that have been implemented. This implies the one that is a difference between both groups is that the political parties aim at getting members electing.