A customer wants to configure two resource groups and create the following shared filesystem structure：Resource GroupFilsystem Mount Point Rg1/app1 Rg2/app1/data Which of the following will ensure the proper mount order for these filesystems？（）

• A、Set filesystem recovery method to parallel
• B、Set filesystem recovery method to sequential
• C、Set filesystem recovery method to parallel and configure a parent/child relationship for the resourcegroups
• D、Set filesystem recovery method to sequential and configure a parent/child relationship for the resourcegroups