The Volume of Oxygen Consumed (In Liters Per Minute) While

The volume of oxygen consumed (in liters per minute) while a person is at rest and while he or she is exercising (running on a treadmill) was measured for each of 50 subjects. The goal of this study was to determine whether the volume of oxygen consumed during aerobic exercise can be estimated from the amount consumed at rest. The results are plotted below.
What does this scatterplot suggest about the relationship?

A) There is a negative association between the volume of oxygen consumed at rest and while running.
B) There is an outlier in the plot.
C) An increase in the volume of oxygen consumed at rest causes an increase in the volume of oxygen consumed while running.
D) The relationship between the volumes of oxygen consumed at rest and while running is nonlinear.