【单选题】

Questions 144-146 refer to the following letter.Dear Sirs,

We rank (144) one of the top leading distributors of kitchen appliances in KoreA、
We have (145) widened our sales items into washers and vacuum cleaners and are now thinking of adding new lines to our present stocks. We are particularly interested in your "Clinatch" video cassette andDVD、players and should be glad if you would send us your complete catalogue and terms of sales and payment.
Your products are not (146) offered by any other dealer in this area, and if we decide to introduce them, we should like to have the rights of sole distribution in this areA、
We look forward to your favorable reply.
A、of
B、for
C、as
D、into