A massive increase in the amount of spam occurred last year, and spammers have moved from trying to sell fake medicines and counterfeit goods to what are called pump and dump shares. It seems incredible, but spam-filtering companies report that the increase led to the amount of spam doubling, to the point where 19 out of 20 e-mails were unsolicited. This is not a claim to dismiss easily as an exaggeration, as it comes from the company responsible for filtering a quarter of all the worlds e-mail traffic. The pump and dump shares are what are called penny shares that the spammers promote through 100 million e-mails (a quarter of all spam), claiming that the price is about to increase rapidly. They only achieve a very low hit rate, but because they send out so many e-mails, enough people buy the shares that the price does rocket and the spammer is able to sell at a massive profit.

Question: The intention of the author is to warn the reader that the very large rise in spam is coming from tricksters.
Options:
A. true, B. false, C. uncertain
Answer: "A"