Great changes have been taken place in the way people communicate with each other. In the past people write letters to share informations and later they talked with each other in the telephone. Now more and more people use our own mobile phones to communicating. And instead writing on the paper, they e-mail to each other on the computer. As a result, people find that quicker and easier to communicate, and at the same time some people feel that they become poorer in writing. They worry about whether people can be as closely as before

在“医方卜筮，艺能之难精者也”中，“艺能之难精者也”应今译为（）

A.是技艺中难以精通的

B.技艺难以精通

C.是难以精通的技艺

D.是艺术才能中难以精通的技艺