11. Bob, a seismologist, measures the distance of seismographs from each other to determine the epicenter of an earthquake. Why is it important for Bob to determine the epicenter of earthquake? It is important for Bob to determine the epicenter of an earthquake because ___.

A. it is the origin of the earthquake.
B. it is where the breaking of rock begins.
C. it is directly above the origin of the earthquake.
D. it is directly below the origin of the earthquake.

Respect question, answers will be much appreciated, ty !! ^__^