Given those answer options, answer the question: Read the following article and answer the question. Article: Astronaut Zhai Zhigang became the first Chinese man to walk in space on Saturday, climbing out of prefix = st1 /China's Shenzhou VII spacecraft in a technological feat that made the Chinese people excited. "I'm feeling quite well. I greet the Chinese people and the people of the world," Zhai said as he climbed out of the craft at around 16:40 Beijingtime, a historic achievement telecast live on CCTV. Tens of millions of Chinese viewers gathered before TV screens to watch the moment. Chinese President Hu Jintao and other top leaders had appeared at the BeijingAerospaceControlCenterto watch the live transmission of Zhai's spacewalk. Zhai, 42, chosen by an expert team for the first "extra-vehicular activity". unveiled a red national flag, helped by colleague Liu Boming, who also briefly popped his head out of the capsule. Zhai slowly made his way towards a test sample of solid lubricant outside the capsule, took a sample and handed it to Liu. Zhai safely returned inside the craft after about 20 minutes. The walk marked the high point of China's third manned space journey, which has received widespread media coverage. Zhai wore a$4.4 million Chinese-made suit weighing 120kg. Liu wore a Russian-made one and acted as a back-up. The third crew member, Jing Haipeng, monitored the ship from inside the re-entry module. The risky manoeuvre is a step towards China's longer-term goal of assembling a space lab and then a larger space station, analysts said. "On this flight, Chinese people's footprints will be left in space for the first time," said a commentary by the Xinhua News Agency. The astronauts embarked on their walk after receiving a clean bill of health from doctors on the ground at mission control in Beijing, Xinhua said. Zhai's suit has 10 layers and takes up to 15 hours to assemble and put on. China's first manned spaceflight was in 2003. A second, two-manned flight followed in 2005. The only other countries that have sent people into space are Russiaand theUnited States. Question: Astronaut Zhai Zhigang will be remembered as the first Chinese _ . Answer:
A:
to walk in space