Twitter and Tumblr are the two major ________ services today.
A) microblogging
B) microposting
C) redditing
D) subredditing
Question 2
________ augments its bookmarks and thumbs-up, thumbs-down ratings with a personalized recommendation engine that suggests web pages to visit based on a user's ratings of previous pages.
A) Digg
B) reddit
C) Delicious
D) StumbleUpon