An operator needs to create /dir1/dir2

An operator needs to create /dir1/dir2/dir3. The /dir1 does not exist. What command can be used to create dir2 and dir3?（）

• A mkdir /dir1/dir2/dir3
• B mkdir -R dir1/dir2/dir3
• C mkdir -p /dir1/dir2/dir3
• D mkdir -r /dir1/dir2/dir3