A buffer contains 0.50 mol CH3CO2H and 0.50 mol CH3CO2⁻ diluted with water to 1.0L. How many moles of NaOH are required to increase the pH of the buffer to 5.24? (pKa of CH3CO2H=4.74)

A) 0.18 mol
B) 0.36 mol
C) 0.45 mol
D) 0.72 mol