Answer: reliability
Step-by-step explanation:
Thw options to the question are:
a. prediction.
b theoretical support.
c. validity.
d. reliability.
Correlation shows the relationship that exists between two or more things. Correlation shows the linear relationship that exist between two variables.
Since the researcher determines that a significant positive relationship exist between self-esteem measured at the beginning and end of the college semester for the students sampled, this explains that correlation can be used to reliability.