[" (0.Find the number of non-negative integral solutions "],[" of the cquation "x+y+z+2w=20" ."],[" (A) "^(20)C_(3)+1%" ."...+^(4)C_(3)],[" (B) "^(2)-C_(3)+=-C_(3)+20C_(3)...+^(2)C],[" (C) "2^(2)C_(2)+^(20)C_(2)+^(18)C_(2).....^(2)C_(3)],[" (D) "^(22)C_(3)+^(20)C_(3)+^(18)C_(3)...+^(4)C]