liuhaowuhan
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angina pectoris develops from lack of oxygen, leading to chest pain, and reducing oxygen requirement is necessary.. you know beta1 receptor's action enhances myocardial contractility, and meanwhile makes heart rate high which is termed trachycardia, so inactivating beta1 is useful to fight against the symptom.
with regard to decresing Bp, I think you can do it by the way of decreasing peripheral resistance, which is opposite of action of alpha1.
the answer is evident, you can choose C
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