A 68-year-old woman with long-standing hypertension and ischaemic heart disease is admitted with new-onset dyspnoea, orthopnoea, bibasal crackles and an echocardiogram showing LVEF 30%. She is euvolaemic after diuresis. Which combination best reflects the contemporary foundation pharmacological therapy recommended by the Canadian Cardiovascular Society for heart failure with reduced ejection fraction (HFrEF)?