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)
it's C cause in the meaning of premise, it says a statement assumed to be true. that sentence about pretzel is assuming that pretzels are better than chips
Since nothing is underlined i presume that the underlined pronoun is them. It is in the dative case because them is an object and answers the question to whom was something done. Them refers to the trainer's team.