For an autoregressive process to be considered stationary a) The roots of the characteristic…

For an autoregressive process to be considered stationary

	a)	The roots of the characteristic equation must all lie inside the unit circle
	b)	The roots of the characteristic equation must all lie on the unit circle
	c)	The roots of the characteristic equation must all lie outside the unit circle
	d)	The roots of the characteristic equation must all be less than one in absolute value