But, all researchers have arrived at the same conclusion. What does this say about the conclusion?

That the conclusion is well supported.

Explanation:

If all various studies lead to the same result and provides consistent answers. The the conclusion is well supported.

metamorphism is the change of minerals or geologic texture (distinct arrangement of minerals) in pre-existing rocks (protoliths), without the protolith melting into liquid magma (a solid-state change). the change occurs primarily due to heat, pressure, and the introduction of chemically active fluids. i hoped i !