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Set up a dimensional-analysis proportion so units cancel cleanly. The concentration is 250 mg per 1 mL. Volume needed (=) (\dfrac{\text{ordered dose}}{\text{concentration}}):

(\displaystyle \text{mL} = \frac{375\ \text{mg}}{250\ \text{mg/mL}} = 1.5\ \text{mL}).

Thus, select C. On TEAS, write the fraction explicitly to avoid inversion errors: (375\ \text{mg} \times \frac{1\ \text{mL}}{250\ \text{mg}} = 1.5\ \text{mL}). Reasonableness check: 375 mg is one and a half times 250 mg, so expect 1.5 mL. Distractors map to typical slips—1.2 mL from mis-dividing, 1.0 mL underdoses (250 mg), and 2.0 mL overdoses (500 mg). After math, apply clinical thinking: confirm that 1.5 mL is within safe IM volume for the chosen site (e.g., deltoid often ≤1 mL–2 mL depending on policy; ventrogluteal accepts more), and verify medication compatibility and rate. TEAS focuses on the arithmetic and setup, not site selection, but disciplined unit work mirrors real medication safety. If the order or concentration required a unit conversion (e.g., mg ↔ mcg), perform that before dividing to keep units consistent and canceling.