Which of the Following Statements Is False

Which of the following statements is false?

A) A runnable thread transitions to the blocked state when it attempts to perform a task that cannot be completed immediately and it must temporarily wait until that task completes.
B) When a thread issues an input/output request, the operating system blocks the thread from executing until that I/O request completes-at that point, the blocked thread transitions to the runnable state, so it can resume execution.
C) A blocked thread cannot use a processor, even if one is available.
D) Each of the above statements is true.