取消
参考答案暂无
解析:A: some of your clients are your important suppliers and others are your distributors. Therefore keeping contact with them means you keep a good communication with your suppliers or distributors whose information is crucial to your production and sales. Any information you gain from your client can be used to test the popularity of your products. Usually formal or official contact with your clients won’t give you much more opportunities to get the information you need. Personal contact however can be developed into a very useful contact since it can produce a sound environment in which you talk to your clients personally. And you can even get some information about your revival through personal contact which you can use to take the advantage in the competition. And of course you will know better what your clients think of your products and what they expect from you since most of your clients are reluctant to tell you because of the strict environment of formal contact.