A client being evaluated in the emergency
题型：单项选择题
问题：
A client being evaluated in the emergency department complains of chest pain that radiates to his neck, shoulders, back, and arms, which decreases when he sits up and leans forward. Based on this assessment, the nurse suspects that he has（）
A. developed another myocardial infarction (MI).
B. endocarditis.
C. pericarditis.
D. myocarditis.