若变量均已正确定义并赋值，以下合法的C语言赋值语句是

A.a=a+10;

B.a+10=b+c;

C.a=10.3%2;

D.a=10=c+b;

A.x1=26%3

B.1+2=x2;

C.x3=0x12;

D.x4=1+2=3;

A.= b+1;

B.a=b=c+2;

C.int 18.5%3;

D.a=a+7=c+b;

A.x+1=y

B.++x,y=x--

C.x=x+10=x+y

D.double(x)/10

A.=b+1;

B.a=b=c+2;

C.int 18.5%3;

D.a=a+7=c+b;

A.switch (x + y) { ...... }

B.switch (ch + 1 ) { ...... }

C.switch ch { ...... }

D.switch (a + b ); { ...... }

A.s=a+b;

B.s=a+c;

C.s=s+c;

D.s=b+c;

A.a=a+7;

B.a=7+b+c,a++

C.int(12.3%4)

D.a=a+7=c+b

A.定义了基本整形变量a,并给a赋值为8

B.给a赋值为5.

C.定义了基本整形变量a

D.定义了长整形变量a

A.a+1=2;

B.a+=a*6;

C.a=8.8f;

D.int a=8;