Is it C? The Earthlings c<span>an either join by choice, or they will be forced to do so.</span>
I believe the correct answer is B. Increases your reading speed. The reason for this is you are just shaming through what your reading to find the main idea, so you skip over the details that aren't that important.
Hop this helps!
1. C 2. C 3. B 4. A This is because of safety laws