Answer:
Option: A is the correct answer.
A. There may be a correlation between having a restaurant and having a greater number of annual visitors.
Explanation:
An association of art museums releases a study reporting that museums with restaurants have a greater number of annual visitors.
Correlation coefficient is a statistical measure that represents the relationship between two or more variables.
This means that there is some kind of correlation between the museum having a restaurant and annual visitors because they are somewhat connected as with the museum having restaurant the annual visitors increases.