( by using seismic data from several locations scientist can determine the epicenter of an earth quake).
Step-by-step explanation:
<em>" The size or magnitude of earthquakes is determined by measuring the amplitude of the seismic waves recorded on a seismograph and the distance of the seismograph from the earthquake "</em>
Hence option A is correct. ( by using seismic data from several locations scientist can determine the epicenter of an earth quake).