Which of the following is NOT true about tablet computers' size and features?

Which of the following is NOT true about tablet computers' size and features?
 
  A) Most tablet computers are capable of connecting to wireless networks, and some are able to access data via cellular network connections.
  B) Some tablet computers have screens as small as 7 measured diagonally, while others have screens closer to 16.
  C) Since they are designed to be lightweight and have long battery lives, tablet computers are traditionally not as powerful as traditional PCs.
  D) Tablets are capable of Internet browsing, e-mail, light gaming, and some productivity work.