Which of the Following Statements About the Average Variable Cost

Which of the following statements about the average variable cost curve is True?

A) The average variable curve emulates a normal supply curve.
B) The average variable cost curve declines as output increases.
C) The average variable cost curve usually is U-shaped.
D) If variable costs per unit were constant, then the average variable cost curve would be a vertical line.
E) The average variable cost curve resembles a normal demand curve.