Research Done in the 1930s by the French Physiologist Jean

Research done in the 1930s by the French physiologist Jean Poiseuille showed that the resistance R of a blood vessel of length l and radius r is where k is a constant. Suppose a dose of the drug TPA increases r by 22%. How will this affect the resistance R? Assume that l is constant.

A) It will increase by 110%.
B) It will drop by 110%.
C) It will increase by 88%.
D) It will drop by 88%.