A、It is time consuming and doesn’t provide much information. B、A lot of the information is in foreign languages. C、There are not

M: I’m doing some research into the French revolution.
W: Oh, I did some on that last year.
M: Why do you think I’m here! Could you suggest some interesting and useful sources?
W: Sure. I found "Voices from the French Revolution" by Henri Le Brun to be very useful, as well as extremely interesting and well written.
M: What makes it so good?
W: Well, he took extracts from diaries kept by people involved in the revolution. They re ally give you an idea of how it felt to live in France during that time.
M: It sounds great. Why haven’t I heard of it before?
W: Well, it’s only just been translated from the French original and none of the professors have added it to their booklists yet. I used the French version and translated passages myself.
M: I see. I have been told that "The French Revolution" by Victoria Jones is useful.
W: I didn’t find it very useful. I mean, there was nothing in it that you can’t find else where. On the other hand, it’s cheap, because it’s available in paperback, and you can buy it at many bookshops.
M: What about using resources available on the Internet?
W: I used the Internet for my research, but I didn’t find it very helpful. Many of the web sites were too small to contain much detailed information. Others provided links to other websites, but I found myself spending a lot of time following links and not finding much information.
M: Yes, I’ve run across that problem myself.
W: You could try the new edition of William Wright’s book. It has the same title as Victoria Jones’ book. It only came out a couple of months ago and I haven’t seen a copy yet. A lot of it has been rewritten or consists of additional material recently found in French archives.
M: Thanks for your help. I’ll go to the bookshop and see if I can find the books you’ve recommended.
W: when does your research have to be completed by?
M: Well, the essay is due in six weeks, so I’ll try to finish the research in four, giving me two to write the essay.
W: Good luck!