Let $F$ be the focus of the parabola $C: y^2 = 4x$, point $A$ is on $C$, point $B(3,0)$. If $|AF| = |BF|$, then $|AB| =$ A. $2$ B. $2\sqrt{2}$ C. $3$ D. $3\sqrt{2}$
Let $F$ be the focus of the parabola $C: y^2 = 4x$, point $A$ is on $C$, point $B(3,0)$. If $|AF| = |BF|$, then $|AB| =$\\
A. $2$\\
B. $2\sqrt{2}$\\
C. $3$\\
D. $3\sqrt{2}$