If You Are Estimating Y = $\beta$ ₁ $\beta$ ₂x + E
and Realize X and Y Are Both

If you are estimating y = $\beta$ ₁ + $\beta$ ₂x + e
And realize x and y are both random variables,what condition must be true for simple regression estimators to be BLUE?

A) the data have been collected via random sampling
B) the data are time series data
C) e is normally distributed
D) x is normally distributed