【单选题】

Questions 150-152 refer to the following letter.

Dear Sir or Madam,
We have been given your address through the (150) of theAmericanEmbassy in Tokyo, and have this opportunity to contact you for the following purpose.
We are one of the leading firms in Tokyo, specializing in the export ofCanned TunA、
Persons who are experienced and familiar with these industries rank our products high, and we think our products will be welcomed in your country (151) account of their superior qualities and attractive prices. We are, therefore, interested in finding the first-class importers who would be in a position to handle our products inAmericA、
We would appreciate any assistance you (152) us in establishing contact with qualified importers, and if you require further information or samples we will be pleased to send it along promptly.
Very truly yours,
Mizko Yamashi,Export Manager
A、of
B、at
C、for
D、on