When shock becomes progressive, it is incredibly important that pharmacological and other interventions be delivered rapidly, as the patient is at a very high risk of dying. Generally, a cocktail of drugs is introduced as soon as possible in the hopes of restoring blood flow to the so-called non-essential organs and tissues and improving perfusion pressure around the so-called essential organs. Which therapeutic drug exerts its beneficial effects to improve the progression of shock through activation of beta-2 adrenergic receptors? Select one: a. dopamine b. epoprostanol c. dobutamine d. corticosteroids