Which of the Following Statements About Spam Is Not True

Which of the following statements about spam is not true?

A) Most spam originates from bot networks.
B) Cell phone spam usually comes in the form of SMS text messages.
C) Spam costs for business are very high.
D) Spamming has mushroomed because it is so inexpensive and can reach so many people.
E) Spamming is less regulated in Europe than in the United States.