to improving services we will provide customers with all the information they need.A. Be

问题补充：

to improving services, we will provide customers with all the information they need.

A. Being committed

B. Having committed

C. Committed

D. Committing

答案：

A. Being committed

B. Having committed

(答案→)C. Committed

D. Committing

解析： 句意：承诺要提高服务，我们会给顾客提供他们需要的信息。Be committed to doing sth承诺做…，用过去分词做状语，相当于Because we are committed to improving services，选C。