Let's do a rolling, day-to-day news quiz this week. Today's question: Why did Britain's Prince William say he and his wife "couldn't be happier"?
a. Queen Elizabeth has announced plans to abdicate her throne in his favor
b. They started a new Twitter account to promote their new line of collectable royal doilies
c. Catherine gave birth to a baby boy on Monday
d. William will officially complete his military service tomorrow
(Answer below in the comments section.)