The correct answer is B (1.43 pints), representing daily sweat production. Normal sweat production varies widely with activity and climate; baseline insensible perspiration is about 0.5-1 liter daily. 1.43 pints ≈ 0.68 liters, which is a reasonable baseline value. Options A (1.40), C (1.45), and D (1.49) are very close, making this a precise numerical distinction.