Please mark the only incorrect comparison between the APT and the CAPM models:

	a.	APT and CAPM can arrive at the same security market line
	b.	Both models explain a securitys expected return as a function of one (or several) systematic risks (called betas)
	c.	Both APT and CAPM differentiate between market risk and firm-specific risk
	d.	Both models assume that investors are mean-variance optimizers