Choice A is the correct answer. Parallel to vertical is vertical.

1. Original: $x = 5$ is vertical.
2. New: Must be vertical ($x = k$).
3. Point: x-coordinate is 2.
4. Equation: $x = 2$.

💡 Strategic Tip: Match the variable for parallel lines ($x o x$, $y o y$).

Choice B is incorrect because horizontal. Choice C is incorrect because wrong location. Choice D is incorrect because horizontal.