With the range of data available, geologists cannot predict exactly where and when earthquakes will occur.
true, or false?

It is an absolutely true fact that with the range of data available, geologists predict exactly where and when earthquakes will occur. The correct option among all the options that are given in the question is the first option. It can be said that this is one natural occurrence that cannot be predicted with all the data that the geologists have. 

I'm pretty sure it's c. extremely gradual but not 100% sure though.

Answer the collision of tectonic plates;