Which Statements Are True? 1 Read a Supply Curve Over

Which statements are true? 1 Read a supply curve over and down.
2 Read a marginal cost curve over and down.
3 Read a supply curve up and over.
4 Read a marginal cost curve up and over.

A) 3 only
B) 1 and 2
C) 1 and 4
D) 2 and 3
E) 2 and 4