What is the difference between the commands test -e path and test -f path?

What is the difference between the commands test -e path and test -f path?

A.
They are equivalent options with the same behaviour.

B.
The -f option tests for a regular file. The -e option tests for an empty file.

C.
Both options check the existence of the path. The -f option also confirms that it is a regular file.

D.
The -f option tests for a regular file. The -e option tests for an executable file.