The answers D
hope this helps
<span>You
get muscle cramps. This can occur during strenuous
exercise or even at rest. The most common
cause of muscle cramps is dehydration. Muscle cramps happen involuntarily
and occur for longer periods with the muscles contracted. When it is not
prolonged, the involuntary contraction is called spasms and it is occasionally
referred as twitch.</span>
Answer:
These four subsystems are called "spheres." Specifically, they are the "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air). Each of these four spheres can be further divided into sub-spheres.
93 million miles is right
