What is correct about the impact of customer engagement on the service system？ A: The higher the customer engagement is, the less the customer's influence on the service is. B: The higher the customer engagement is, the more controllable the service system is. C: The higher the customer engagement is, the lower the service efficiency is. D: The higher the customer engagement is, the higher the customer satisfaction is.

Generally speaking, the cost of living in a big city is higher than ________ in a town.

According to Maslow, human needs are arranged in a hierarchy, The higher level needs be generatedOnly when the lower level needs are met.

Generally speaking, the cost of websites used for commercial purpose is higher compared with that for personal use.

Small population may mean ______. A: higher productlvity, but a lower average income B: lower productivity, but a higher average income C: lower productivity and a lower average income D: higher productivity and a higher average income