Which of the following patient scenarios is most consistent with unstable angina?
A:A 70-year-old female has worsening chest pain with deep inspiration over the past 3 months
B:A 65-year-old male has increased frequency and severity of chest tightness and shortness of breath while mowing his yard over the past few weeks
C:A 40-year-old male is experiencing sharp chest pain while lying flat that improves when leaning forward
D:A 55-year-old female has chest pain lasting 5 minutes intermittently over the past 6 months, occurring after heavy meals and relieved by rest