Answer:
Option: A is correct.
( by using seismic data from several locations scientist can determine the epicenter of an earth quake).
Explanation:
" 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 "
Hence option A is correct. ( by using seismic data from several locations scientist can determine the epicenter of an earth quake).