A​ 4-person grievance committee is to be selected out of 2​ departments, A and​ B, with 12 and 30 ​people, respectively. In how many ways can the following committees be​ selected? Complete parts​ (A) through​ (E) below. ​(A) 3 from A and 1 from B 6600 ​(B) 2 from A and 2 from B 28710 ​(C) All from A 495 ​(D) 4 people regardless of department 111930 ​(E) At least 3 from department A nothing