OKAY SO, do you have any more info?
Earthquakes produce three types of seismic waves: primary waves, secondary waves, and surface waves. Each type moves through materials differently. In addition, the waves can reflect, or bounce, off boundaries between different layers.
C sounds the best answer to find the exact location
~Hello There! ^_^
Your question: The most important measure of the size of a river is the..?
Your answer: The most important measure of the size of a river is the volume of its discharge.
The answer is option C.
Happy Studying! =)