Which result is the most likely outcome of the successful actions of an interest group?

The government changes its policies on a subject the group cares about it is the most likely outcome of the successful actions of an interest group. Over the past several decades, the United States witnessed a tremendous growth in the number of interest groups, it offers individuals an important avenue for political participation.

The most likely result is The government changes its policies on a subject the group cares about

Interest groups operate by providing support to representatives through either popularity campaign or financial aid. If they managed to won their chosen representative, it would be very likely that the representative will make regulations that would benefit the interest groups.