A security has an expected return that falls above the security market line. What must be true about this security?

A$.$ The scurity is underpriced and has a zero net present value.

B$.$ The security is underpriced and has a positive net present value.

C$.$ The security is overpriced and has a zero net present value.

D$.$ The security is underpriced and has a negative net present value.

E$.$ The security is overpriced and has a negative net present value.

F$.$ The security is overpriced and has a positive net present value.