【单选题】

Before it became one most important symbol for e-mail, the @ symbol (符号) was used to show the cost or weight of something. For example, if you bought 6 apples, you might write it as 6 apples@ $ 1.10 each.

With the introduction of e-mail came the popularity of the @ symbol. The @ symbol or the "at" sign separates a person’s online user name from his mail server address. For instance, joe@ uselessknowledge. com.Although it is widespreadly used on the Internet, there is really no official name for this symbol. Nobody knows how the @ symbol comes on to use
History tells us that the @ symbol was from the tired hands of the monks (和尚).During the MiddleAges before the invention of printing presses, every letter of a word had to be copied by hand for each copy of a published book. The monks looked for ways to shorten the word "at".As a result, the monks circled around the "a" and made the easier symbol.
Why did the monks make the symbol
A、Because it is more beautiful than the word "at".
B、Because they disliked the word "at".
C、Because they wanted to shorten the word in order to copy it more easily.