You work in a company which uses SQL Server 2008. You are the administrator of the company database. Now you are in charge of a SQL Server 2008 instance. You have to perform the backup of the default trace according to the requirement of your failure recovery plan. The default trace is contained in the subdirectory.You have to backup the subdirectory. Which SQL Server database engine subdirectory should be backed up？（）

A. DATA
B. INSTALL
C. LOG
D. BINN