Which of the following methods calls return 2? (choose all that apply) public int howmany(boolean b, boolean b2){ return b2.length; } a. howmany(); b. howmany(true); c. howmany(true, true); d. howmany(true, true, true); e. howmany(true, {true}); f. howmany(true, {true, true}); g. howmany(true, new boolean[2]);