Which three implementations are valid?

Given the code fragment:
interface SampleClosable {
public void close () throws java.io.IOException;
}
Which three implementations are valid?

A.
public class Test implements SampleCloseable {
public void close() throws java.io.IOException {
/ / do something
}
}

B.
public class Test implements SampleCloseable {
public void close() throws Exception {
/ / do something
}
}

C.
public class Test implements SampleCloseable {
public void close() throws java.io.FileNotFoundException {
/ / do something
}
}

D.
public class Test extends SampleCloseable {
public void close() throws java.IO.IOException {
/ / do something
}
}

E.
public class Test implements SampleCloseable {
public void close()
/ / do something
}
}

Explanation:
A: Throwing the same exception is fine.
C: Using a subclass of java.io.IOException (here java.io.FileNotFoundException) is fine
E: Not using a throw clause is fine.