What Is the Difference Between Microevolution and Macroevolution

What is the difference between microevolution and macroevolution?

A) Microevolution is hypothetical because changes are too small to be observed, whereas macroevolution is detectable.
B) Microevolution deals with microscopic organisms, whereas macroevolution deals with larger ones.
C) Microevolution describes what happens in small populations, whereas macroevolution deals with large populations.
D) Microevolution describes changes within a population over a short period of time, whereas macroevolution describes larger changes such as the formation of new species over longer periods of time.