Why Is the Republican Party Considered a Political Party but the Boy

Why is the Republican Party considered a political party but the Boy Scouts are not?

A) Republicans have historically been considered a party, but the Boy Scouts have not.
B) The budget of the Republican Party rivals that of other political parties, but the Boy Scout organization budget is much smaller.
C) The Republicans are oriented toward achieving legitimate control of government, whereas the Boy Scouts do not want to control government.
D) The Republicans have official membership, whereas the Boy Scouts do not.