A. Hacia, is the answer.
I see that someone else answered, C. Debajo de. That is NOT correct. Debajo means under.
In this question, they are asking you for the right word to finish the sentence.
The sentence says: The bus stop is _A.at_ the corner.
This is why A. Hacia, Is the best answer!
I am fluent in spanish, so if you need any more help, just let me know :)
Hope this helps !