Read the passage. Then, answer the question that follows. Jack London led one of the most exciting and adventurous lives any writer has ever had. As a teenager, he bought a boat and sailed along the California coast. Later, he went on a camping trip through the United States and Canada. In 1897, he joined the gold rush to the Klondike. In addition to writing novels and stories, London worked as a war correspondent and sailed in the Caribbean and the South Seas.

Which of the following details reveals the writer's attitude about the subject?

a one of the most exciting and adventurous lives
b through the United States and Canada
c joined the gold rush to the Klondike
d worked as a war correspondent