Danny decided to pay his friend $50 every time he bites his finger nails. As a result of this treatment, Danny learned to not bite his own finger nails.

A	The dependent variable was paying his friend money and the independent variable is biting his nails.
B	There is not an independent variable in this scenario.
C	The dependent variable was biting his nails and the independent variable was paying his friend money.
D	There is not a dependent variable in this scenario.