The total utility curve is Select one: O A. a downward-sloping curve that becomes less steep as the quantity consumed increases. O B. an upward-sloping curve that becomes steeper as the quantity consumed increases. O C. an upward-sloping curve that becomes less steep as the quantity consumed increases. O D. an upward-sloping curve with constant slope. O E. a downward-sloping curve that becomes steeper as the quantity consumed increases