составьте вопрос к предложению :
Geophysicists examine the seismic data for the presence of suitable traps.
чтоб в начале предложения стояли
a) Who
b) What
c) What kind of
d) Why​

a) Who examine the seismic data for the presence of suitable traps?
b) What did geophysicists examine?
c) What kind of presence do geophysicists examine?
d) Why do geophysicists examine the seismic data?