Professor Jacobs Believes That Sleep Deprivation Is Related to Conflicts

Professor Jacobs believes that sleep deprivation is related to conflicts between roommates.He collects data on the number of hours of sleep and the number of roommate conflicts for a group of college students over the course of a month.He obtains a correlation coefficient of -0.75.What can he conclude?

A) 75 percent of the roommate conflicts he investigated were not related to sleep deprivation.
B) With fewer hours of sleep there were fewer conflicts.
C) With fewer hours of sleep there were more conflicts.
D) Hours of sleep and conflicts were not related.