A 45-year-old with 4 hours of intermittent chest tightness has a normal ECG and serial high-sensitivity troponins below the 99th percentile at 0 and 2 hours. He is pain-free and has no high-risk features. What is the most appropriate next step?ADischarge home with outpatient follow-up and return precautionsBAdmit for observation with routine stress testingCOrder inpatient coronary CT angiography nowDStart heparin infusion and admit to telemetryEGive aspirin and arrange urgent invasive angiography todayCheck my answer