Answer:
it is d because i took the k 12 test
Explanation:
Answer:
There may be some other third variable
Explanation:
The third variable also called the confounding variables. These are the variables that a researcher does not able to control these variables. These variables eliminate, destroy the internal validity of an experiment. These are also called the mediator variable or confounding variables. These third variables influence the independent as well as the dependent variable. When the researcher is not aware of the third variable and even not able to control the third variable then this variable affects the result of an experiment.
Radioactive dating is a way to determine the age of fossils by comparing the number of stable isotopes to the number of unstable isotopes using known half-life. The only rocks that can be radiometrically dated would be the igneous rocks.
The answer would be letter C.
