Here's a problem to solve: How did scientists arrive at the theory of plate tectonics?

Among the 4 following options, which is the correct answer?

- A: by determining the age of lava rising at ocean ridges
 
- B: by determining the composition of limestone deposits
 
- C: by determining the rate of weathering of mountain ranges
 
- D: by determining the type of sedimentary rock formed on land
 