Question

seismograms contain information that can be used to determine
a how strong an earthquake was
b how long an earthquake lasted
c the earthquake’s location
d all of the above

Explanation:

Seismograms record seismic wave data. The amplitude of the waves indicates earthquake strength (magnitude), the time span of the recorded waves shows how long the earthquake lasted, and the time difference between different seismic waves (like P-waves and S-waves) allows calculation of the earthquake's distance from the seismograph, which is used to pinpoint its location. Thus, all the listed properties can be determined from seismograms.

Answer:

d. All of the above