Interest groups do not aim to take power in the sense of political parties. These groups gather in terms of common interests that are organized to affect political authorities. Interest groups are interchangeably defined as pressure groups. The main element of interest groups is “interest”; either material or moral pressure over political authority or government is another point to be underlined. Interest groups generally do not aim to come to power, however they force political parties and governments in order to generate interest. Therefore, the correct option is A.