A client has sustained a right tibial frac
题型：单项选择题
问题：
A client has sustained a right tibial fracture and has just had a cast applied. Which instruction should the nurse provide in his cast care（）
A. Cover the cast with a blanket until the cast dries.
B. Keep your right leg elevated above heart level.
C. Use a knitting needle to scratch itches inside the cast.
D. A foul smell from the cast is normal.