SAT Math Practice Question

$$h=-16 t^{2}+v t+k$$The equation above gives the height $h$, in feet, of a ball $t$ seconds after it is thrown straight up with an initial speed of $v$ feet per second from a height of $k$ feet. Which of the following gives $v$ in terms of $h, t$, and $k$ ?

1. A.$v=h+k-16 t$
2. B.$v=\frac{h-k+16}{t}$
3. C.$v=\frac{h+k}{t}-16 t$
4. D.$v=\frac{h-k}{t}+16 t$