"How many common English words were invented by Shakespear

　　"How many common English words were invented by Shakespeare?'
　　How long did it take people to find the answer to this question 15 years ago?And now!you can google it and find the answer immediately!:
　　Google is the most popular Internet search engine in the world.It was invented by two students,Larry Page and Sergey Brin.They met in 1993,when they were studying computer science at Stanford University,USA.They dreamed of producing something that could also answer any question in seconds.
　　Internet seach engines at that time were slow and gave many websites that weren't useful.In January 1996,Page and Brin decided to make a better and faster search engine.They thought the results should be based on the most popular websites.
　　Nobody would give them money for their project,so they used their own money.They also borrowed money from family and friends.Then,in 1998,they were given a cheque for $100,000,and they started their own company.Their first office was in a friend's garage.The company's name is Google,a word which comes from mathematics.A "google" is a very high number----1 followed by a hundred zeros.
　　The google search engine was soon used by thousands of people worldwide because it was fast,easy and correct.By 2002 it was the biggest search engine on the Internet.Now,more questions have been answered by Google than any other Internet service,from sport to science,and from music to medicine.Google hopes that in the future all the world's information will be put on the Internet,so that everybody can find everything.
　　51.Why did the writer begin this passage by asking you a question?
　　A.Because he or she liked to begin this passage by asking readers a question.
　　　C.Because he or she wanted to make the readers interested in this passage.
　A和C选哪一个?为什么?