During 2020, Leahy Enterprises decreased its discount rate used to calculate pension obligation from 4.3% to 3.8%. The effect on the company's pension expense for the year and pension obligation balance at year end is:

Group of answer choices

A. Decrease pension expense, increase pension obligation

B. Decrease pension expense, decrease pension obligation

C. Increase pension expense, decrease pension obligation

D. Increase pension expense, increase pension obligation

E. No effect on pension expense, decrease pension obligation