The Model Y = $\beta$ ₀ $\beta$ ₁x₁ $\beta$ ₂x₂ $\varepsilon$

The model y = $\beta$ ₀ + $\beta$ ₁x₁ + $\beta$ ₂x₂ + $\varepsilon$ is referred to as a:

A) first-order model with one predictor variable.
B) first-order model with two predictor variables.
C) second-order model with one predictor variable.
D) second-order model with two predictor variables.