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The parasympathetic division (“rest and digest”) promotes energy conservation and digestive activity: it slows heart rate (vagal effect on SA node), constricts pupils (miosis), bronchoconstricts airways modestly, and increases GI motility and secretions through muscarinic (M₃) receptors, facilitating digestion and absorption. Therefore B is correct. A, C, and D describe sympathetic (“fight or flight”) responses: A lists tachycardia and bronchodilation with decreased GI activity; C covers metabolic mobilization (glycogenolysis, lipolysis) mediated by catecholamines; D includes mydriasis (pupil dilation) and reduced salivation—both sympathetic. TEAS A&P often asks you to map autonomic outputs to organs: Sympathetic via norepinephrine/epinephrine acts on α/β receptors to increase cardiac output, dilate bronchi (β₂), shunt blood to muscle, and mobilize fuels, while parasympathetic via acetylcholine on muscarinic receptors supports digestion, elimination, and glandular secretions. Clinically, anticholinergic drugs (e.g., atropine) block parasympathetic tone and cause dry mouth, tachycardia, decreased bowel sounds, and mydriasis; cholinergic agonists or acetylcholinesterase inhibitors produce the opposite. Distinguishing these patterns helps interpret vital-sign changes and medication effects.