单选题

将@"2B青年"替换成@"文艺青年"的代码是：

Question

A. [@"2B青年" stringByAppendingOfString:@"2B" withString:@"文艺"];

B. NSRange range = {0,2}; [@"2B青年" stringByReplacingCharactersInRange:range withString:@"文艺"];

C. NSRange range = {1,2};[@"2B青年" stringByReplacingCharactersInRange:range withString:@"文艺"];

D. [@"2B青年" stringByReplacingOccurrencesOfString:@"文艺" withString:@"2B"];