On initial assessment of a 7-year-old with
题型：单项选择题
问题：
On initial assessment of a 7-year-old with rheumatic fever, which of the following would require the nurse to contact the physician immediately
A. Heart rate of 150 bpm.
B. Twitching in the extremities.
C. Red rash on the trunk.
D. Swollen and painful knee joints.