| | United Shipping will aggressively advertise the new package of services. |
| | United Shipping's rival does not offer some of the services included in the package. |
| | Marketing studies have shown that many of United Shipping's former customers would prefer a combined rate for their various shipping services.
|
| | United Shipping does not already offer all the services separately. |
| | No other shipping company offers the same package of services as United Shipping.
不明白C选项为什么对,感觉是削弱啊~还有求NN解释一下a single rate和 the combined rates~不甚感激~! |