Which of the following sentences is not related to the topic of the paragraph?
"Adventure travel is the hot trend in the tourism industry. Ordinary people are no longer content to spend their two weeks away from the office resting on a sunny beach in Florida. More and more often, they are choosing to spend their vacations rafting down wild rivers, hiking through streamy rain forests, climbing the world’s highest mountains, or crossing slippery glaciers. People of all ages are choosing educational study tours for their vacations."
A、Adventure travel is the hot trend in the tourism industry.
B、Ordinary people are no longer content to spend their two weeks away from the office resting on a sunny beach in Florida.
C、More and more often, they are choosing to spend their vacations rafting down wild rivers, hiking through streamy rain forests, climbing the world’s highest mountains, or crossing slippery glaciers.
D、People of all ages are choosing educational study tours for their vacations.