Exactly 19

Exactly 19.36 mL of 0.1481 M NaOH is used to titrate a 25.00 mL sample of HF.What is the concentration of the hydrofluoric acid?

A) 6.464 × 10−² M
B) 1.147 × 10−¹ M
C) 1.916 × 10−¹ M
D) 2.867 × 10−³ M
E) 6.570 × 10−³ M