You work for a Europe-based company that is interested in doing business internationally. As a top manager of the firm, you want to make sure that your services and goods meet international standards. When evaluating your company's ability to compete in an international market, which of the following would help you standardize the quality of your company's goods and services?a. ISO 9001
b. Product mix depth
c. Benchmarking
d. Enhanced service encounters
e. Six Sigma