Which type of evidence uses information gained through research? a. empirical b. statistical c. anecdotal d. analogical
answer is a.

Empirical evidence is gathered from experiments when you do research. You might notice in chemistry or mathematics, that some correlation have empirical constants already. They have already established these values through experiments and approved by the scientists. Examples of empirical values are the Avogadro's number which is 6.022 x 10^23 particles/mole and the speed of light which is around 300 million m/s.

Ithink the answer is c

Personally i think it is a