Select the correct answer. Which sentence states the author's thesis?

A. During the day, the hateful sun heats up every visible crevice, providing a contrast to the cool, breezy nights.
B. One of the most illustrious sites in the world is known by very few except regular adventure-goers,
C. Travelers are awed by Palo Duro Canyon as its deep, red landscape appears seemingly out of nowhere.
D. This place and its striking diversity deserve recognition for doing exactly what nature does best: providing wonder to all