问题：

[单选]

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.