Which process can be used to estimate earth age?

Drastic boundary changes can occur for all of the following reasons except for a. a shift in the way a river flows b. the collapse of a government system c. a conflict between two neighboring groups d. one country's decision to sell land to another country select the best answer from the choices provide

Sink holes may eventually for to join a. wide valleys b. zone of aeration c. dripstones d. aquifer

What is the best evidence for the plate tectonics?