After Analyzing Her Data, Professor Nelson Discovers That a Correlation

Multiple Choice

After analyzing her data, Professor Nelson discovers that a correlation coefficient of +.75 exists between the amount of coffee a person drinks and the degree of stress experienced. Professor Nelson can safely conclude that:

A) there is no relationship between stress and coffee consumption.
B) stress causes people to drink coffee.
C) as coffee consumption increases, stress also increases.
D) drinking coffee produces stress.