The Joint Method of Agreement and Difference Is Commonly Used

Multiple Choice

The joint method of agreement and difference is commonly used in medical investigation because:

A) it allows researchers to double-check their results.
B) other methods are forbidden by laws against human experimentation.
C) it prevents wasted time and research money by doubling the possibility of obtaining results.
D) it allows a substance to be suggested as a cause while allowing other candidate substances to be eliminate