A is an organization of at least fifty people, affiliated with an interest group that is permitted to make contributions to candidates for federal office.

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.

answer; /// the above statement is (true);

answer; membership group;

i believe your answer is:

quickly

i hope that : )