Which phrase do we use to indicate that we are trying to study the relationship between two variables while the values of all other variables are held unchanged? A. et ali B. ceteris paribus C. ad hominem D. e pluribus unum Why is this restriction so useful in economic analysis? A. If other variables that do not interact with these two variables are not held fixed, the true relationship between the two variables would be hidden. B. lf every is allowed to change, it would be impossible to isolate the impact of one variable on another.