Can someone tell me if I'm right or wrong?

You are correct. The answer is choice A.

The ray extends infinitely in one direction.  

That direction being toward point C. If you wanted the ray to extend in both directions, then it would be a line and not a ray. This would rule out choice C.

Since the ray is infinitely long, we cannot measure its length. The length goes on forever. This rules out choice D.

Choice B can be ruled out because there are infinitely many points on any line, line segment, or ray. Simply apply the midpoint rule to find a new point in between any two points. This process can go on forever.

so far i think you have the right thing going for you just remember soh cah toh

step-by-step explanation:

sine over hypotenuse

cosine   equals adjacent

tangent over hypotenuse

24 units

step-by-step explanation: