以袋为单位的制剂是（）

A.片剂

B.丸剂

C.溶液剂

D.软膏剂

E.颗粒剂

A client seeks care for low back pain of 2 weeks’ duration. Which assessment finding suggests a herniated intervertebral disk（）

A. Pain that radiates down the posterior thigh.

B. Back pain when the knees are flexed.

C. Atrophy of the lower leg muscles.

D. Positive Homans’ sign.