A 1.5 kg block is acted on by two forces: one of magnitude 3.0 N directed east and another of magnitude 3.0 N directed north. What can you say about the instantaneous acceleration of the block? a. The acceleration has a magnitude of 2.0 m/s². b. The acceleration has a magnitude of 2.8 m/s². The acceleration has a magnitude of 4.0 m/s². C. d. The acceleration is zero.