In an experiment, it requires 27.5 ml of a NaOH solution to titrate 0.455 g of dissolved KHP (molecular weight = 204.22 g/mol) to the phenolphthalein end point. Calculate the molarity of NaOH solution.

A.

0.0545 M

B.

0.0742 M

C.

0.0810 M

D.

0.0516 M

E.

0.0661 M