Given the following directory structure： bigProject |--source ||--Utils.java| |--classes |-- And the following command line invocation： javac -d classes source/Utils.java Assume the current directory is bigProject，what is the result？（）

• A、If the compile is successful， Utils.class is added to the source directory.
• B、The compiler returns an invalid flag error.
• C、If the compile is successful， Utils.class is added to the classes directory.
• D、If the compile is successful， Utils.class is added to the bigProject directory.