Question: Read the article and select the best answer. Article: Yang Liwei circled the earth 14 times in 21 hours on October 15 and 16, 2003, landing on the grasslands of Inner Mongolia. Looking a little tired, Yang stepped out of Shenzhou V, smiling and waving at the waiting people. "I feel very good." Yang said to Premier Wen Jiabao on the phone. Yang said to a newspaper, "For our motherland and me, this is a great moment." China's _ of Shenzhou V shows a higher starting point. It has two special systems to protect the spaceman, but neither Russian rockets nor American ones have. Yang didn't know that he was chosen as China's first spaceman until just before the launch. Although Yang was excited at the news, he still slept at 8p.m. as usual and was woken up at 8p.m. the next morning. Before the launch, Yang ate Chinese traditional food-dumplings. We all know that travelers usually eat them before going on a journey for good luck. A stamp Success of China First Manned Space Flight was issued on October 16, 2003, making China the third country to send a spaceman into outer space. Question: It took Yang Liwei _ to travel around the earth every circle. Options: A: 6 hours B: 90 minutes C: 2 days D: 21 hours
Answer:
B