Suppose There Is a Series,Y_t,modeled by the Following Three Equations $\phi$

Suppose there is a series,Y_t,modeled by the following three equations: y_t = $\phi$ +e_t (1)
E_t|I_t-1 N(0, h_t) (2)
H_t = $\alpha$ ₀+ $\alpha$ ₁ e²_t-1, $\alpha$ ₀ 0 ≤ $\alpha$ ₁ $\lt$ 1
Equation 2 indicates the error term is

A) normally distributed
B) conditionally normal
C) bi-modally distributed
D) binomially distributed