The correct answer should be Inexorable because inexorable means unyielding or unrelenting, which would fit the context here.
Or is a coordinating conjunction.
The correct genre for this situation would be B. Website.
This is considered internet genre and is the best possible method of giving driving directions, because it would be easily accessible, and availabe to the public. The other options are more direct, and are more recommended for personalized information. (With the exception of customers that are subscribed to receive updates on the restaurant)
