判断字符型变量ch为大写字母的表达式是（）。

A.'A'<=ch<='Z'

B.(ch>='A') & (ch<='Z')

C.(ch>='A') && (ch<='Z')

D.(ch>='A') AND (ch<='Z')

A.A’<=ch<=‘Z’

B.(ch>=‘A’)&(ch<=‘Z’)

C.(ch>=‘A’)&&(ch<=‘Z’)

D.(‘A’<= ch)AND(‘Z’>= ch)

A.ch>='A'&& ch<='z'

B.ch>=65&& ch<=90

C.ch>=65&& ch<='A'+25

D.ch>='A'&& ch<='A'+26

A.‘A’<=ch<=’Z’

B.(ch>=’A’) & (ch<=’Z’)

C.(ch>=’A’) && (ch<=’Z’)

D.(‘A’<=ch) AND (‘Z’>=ch)

A.‘A’<=ch<=‘Z’

B.(ch>=“A”)&&(ch<=“Z”)

C.(ch>=‘A’)&&(ch<=‘Z’)

D.(ch>=‘A’)AND(ch<=‘Z’)

A.A

B.a

C.z

D.Z

A.c>='A' && c<='Z'

B.c >= 'A' || c<='Z'

C.c < 'A' && c > 'Z'

D.c < 'A' || c > 'Z'

A.'A' <= x <='z'

B.(x>=A) && (x <= Z)

C.('A'<= x) && ('Z' >= x)

D.(x >='A') && (x <='Z')

A.'A'<=x<='Z'

B.(x>=A)&&(x<=Z)

C.('A'<=x)&&('z'=>x)

D.(x>='A')&&(x<='Z')