In a Millikan oil-drop experiment, the charges on several different oil drops were as follows: -5.92; -4.44; -2.96; -8.88. The units are arbitrary. What is the likely value of the electronic charge in these arbitrary units?
A. -1.11
B. -1.48
C. -2.22
D. -2.96
Correct Answer: B. -1.48