单选题：若变量c为char类型，能正确判断出c为小写字母的表达式是

若变量c为char类型，能正确判断出c为小写字母的表达式是 @[D](2)

A. ` 'a'<=c<= 'z' `
B. `(c>= 'a')||(c<= 'z')`
C. ` ('a'<=c)and ('z'>=c) `
D. `(c>= 'a')&&(c<= 'z')`




A.` 'a'<=c<= 'z' `
B.`(c>= 'a')||(c<= 'z')`
C.` ('a'<=c)and ('z'>=c) `
D.`(c>= 'a')&&(c<= 'z')`


答案：D