The Null Hypothesis of a Regression Equation with Three Independent $\beta_{1}, \beta_{2}, \beta_{3} \neq 0$

The null hypothesis of a regression equation with three independent variables can be stated as ______.

A) $\beta_{1}, \beta_{2}, \beta_{3} \neq 0$
B) $\beta_{1}, \beta_{2}, \beta_{3}=0$
C) $\beta_{1}, \beta_{2}, \beta_{3}>0$
D) $\beta_{1}, \beta_{2}, \beta_{3}<0$