We can solve for $x$ by adding 8 to both sides, which gives $4x\leq12$. Then, we can divide both sides by 4 to get $x\leq3$. The only whole numbers less than 10 that satisfy this inequality are 0, 1, 2, and 3, so the answer is $\boxed{\textbf{(B)}\ 0, 1, 2, 3}$.
