The Results of Lobbying Efforts Do Not Always Favor the Interest

The results of lobbying efforts do not always favor the interest of the most powerful groups for which of the following reasons?

A) Members of Congress are often opposed to the influence of interest groups.
B) Not all interest groups have an equal influence in government.
C) Competing interests often cancel out the objectives the groups are trying to achieve.
D) Public opinion has been overwhelmingly opposed to interest groups pressuring Congress.
E) Mobilizing members of interest groups can be difficult.