Which is NOT an event associated with the beginning of the Internet?

Which is NOT an event associated with the beginning of the Internet?
 
  a. The U.S. Department of Defense creates ARPA.
  b. TCP/IP protocol was developed that allowed different computers to communicate with each other.
  c. Amazon.com was one of the first websites on the Internet.
  d. The first e-mail program was written by Ray Tomlinson.

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In MLA style, a(n) ________ citation is indicated within the text of your research paper are indicated in an abbreviated manner surrounded by parentheses.
 
  Fill in the blank(s) with correct word