设有定义：charc;floatf;inti;unsignedu;doubled;下列各表达式的类型分别是（）
1.u+92.D!=f&&(i+2)3.8.2*i+c
A.1.unsigned,2.int,3.double
B.1.double,2.double,3.double
C.1.int,2.double,3.char
D.1.unsigned,2.double,3.int