Which title best summarizes the main idea of the passage?

Câu hỏi: Read the following passage and mark the letter A, B, C, or D to indicate the answer to each of the question.
Big Bend National Park in the southwest of Texas is one of the most majestic desert areas in the United States. It is part of the Chihuahua, which is one of the largest deserts in North America and stretches over both America and Mexico.
Big Bend Park is home to mountains, rivers, basins, valleys, as well as many plants and animals. It is not as popular of a national park as some others. This may be because it takes an extremely long time to get there. Big Bend National Park is hundreds of miles from the nearest legitimate town or airport. When people go there, they need to make sure that their cars have plenty of gas. There is a large risk of running out.
When visitors get to the park, they are usually happy that they drove all the way. The park is 1,252 square miles of desert beauty. There are beautiful cactus blooms as well as glorious sunsets. The hiking trails are magnificent. Visitors can stay in a lodge that is run by the park or camp with their own equipment. However, visitors should be careful. Even though the park is incredibly hot during the day, the lack of moisture in the air makes the heat dissipate at night. The nights at Big Bend are surprisingly cold. It's important to bring a warm sleeping bag.
(Adapted from TOEFL Junior Reading)
Which title best summarizes the main idea of the passage?
A. A National Park to Be Visited
B. A Place of Desert Flowers
C. A Desert That is Cold at Night
D. Cactus Blooms at Big Bend