[Solved] Combinations of a long-acting nitrate and a beta blocker are especially effective in treating angina because: A) Nitrates increase MOS and beta blockers increase MOD. B) Their additive effects permit lower doses of both drugs and their adverse reactions cancel each other out. C) They address the pathology of patients with exertional angina who have fixed atherosclerotic coronary heart disease. D) All of the above Approved Vendor List: A list of suppliers that a company has vetted and approved for purchasing specific goods or services. Bona Fide Claim: A claim that is made in good faith without deception or fraud. Discreetly: Acting in a careful or prudent manner, often to avoid drawing attention or revealing confidential information. Contingent Liability: A potential obligation that may arise depending on the outcome of a future event.