It leaves less people frustrated and work together better.
Vacation time allows her the time to be away from work and also spend time with family and kids. This would allow Christine to work her regularly scheduled hours and the company would not have to alter their or change their working hours. The company could simply assign someone else her job while she is out on vacation time.
Alphabet, and then words, and then sentences, and then picture books, and then chapter books.
Answer: all of the above!