25.0 mL of 1.02 M pyridine (a weak base with Kb = 1.7 x 10⁻9) is titrated with 0.250 M HCl. How many mL of HCl must be added to reach the equivalence point?
a) 15.30 mL
b) 25.20 mL
c) 35.10 mL
d) 45.00 mL