The article says:
in asia, software bots are already being used. samantha guo is from washington, d. c. she visited china in early 2016. she was amazed at how often her friends there used bot technology. one is the asian texting service wechat. guo's friends used it. they paid for meals and ordered movie tickets. they even sent each other gifts through wechat.

this paragraph the reader to understand

a. the cost to visit china from the u. s.

b. the kinds of things bots can people do

c. the story of how bots were invented

d. the differences between wechat and kik