This question is correct. Why didn't you read the explanation provided with that question?
Ok, to avoid this confusion, please read the original question, answer and the explanation below:
Choose the available STATIC methods from the following list (choose two)
Correct Answer: EG
Explanation: Answer-C is wrong, because the method Thread.sleep(int) is NOT available! The available static method is Thread.sleep(long). (Pay attention for the method signature).
Hope you can understand.