Which statement about WSA access logs that are to be processed by sawmill for cisco ironport istrue？（） 

• A、 the default log format can be used
• B、 the fields"%XC%X n" must be appended to the default access log format
• C、 any log format can beused ， but all WSAs must use the same format
• D、 any log format can be used. And different WSAs may use different formats