How do you find the difference in the arrival times of the p waves and the s waves?

The primary agent of contact metamorphism is

I’m his published 95 theses, martin luther protested against? a-the selling of indulgences within the catholic church b-the belief in predestination c-the worshipping of statues of saints d- the catholic church focus on faith as the sole means of salvation

Suppose you had to resolve the problems believed to be caused by distance decay in russia. what would you suggest?