Interpret the Following Order

Interpret the following order. Lasix 20 mg tab i qd @ 9A and again at 3P prn edema

A) Lasix 20 mg one tablet at 9 in the morning and again at 3 in the afternoon
B) Lasix 20 mg tablet daily at 9 in the morning and again in the afternoon if needed for swelling
C) Lasix 20 mg one tablet each day at 9 in the morning and again at 3 in the afternoon if needed for edema
D) Lasix 20 mg four tablets a day as needed for edema