Which is not the responsibility of travel agency to suppliers?

Which is not the responsibility of travel agency to suppliers?
A、Selling products
B、Representing suppliers honorably and faithfully
C、Avoiding dishonest practices
D、Offering counseling
【正确答案】：D
【题目解析】：D选项“Offering counseling”则不是旅行社对供应商的责任。虽然旅行社可能为客户提供咨询和建议，但它们的主要职责是向客户提供旅游服务，而不是向供应商提供咨询。此外，旅行社与供应商之间的关系主要是基于商业合作，而不是提供咨询服务。