Trail because usually cars will drive on a road, street, or highway. and you dont usually see cars driving on a trail especially if its a walking trail
The correct answer is B.
At the end of the poem, the speaker has only to remember his friend. When he does so, he doesn't need to change places with a king. He has love, and that's all he needs. He doesn't need "the riches of kings" when he has the love of his friend.
c he likes his money and can not or will not give anyone any