A、They are convenient. B、They are advanced in technology. C、They are cumbersome. D、They are computerized. C女士问：听说目前有支票授权系统可以使用。

M: The formal yardstick of performance of a business is the financial statements. They are issued at periodic intervals.
W: You are right. I find the comparison of financial statements between one year and the next, particularly helpful in understanding a company’s performance.
Q: What are they talking about?

W: It is said that there are some check authorization systems currently in use.
M: But they are cumbersome relative to the computerized credit card validation systems.
Q: What does the man think of the check authorization systems?