8:
In a survey based on a random sample of 1000 customers. CableCom found that 42% of its customers are satisfied with CableCom's service.

Based on this data, which of the following conclusions are valid?
A
Exactly 42% of all of CableCom's customers are satisfied with their service.
B
About 42% of CableCom's customers are satisfied with their service.
C
Exactly 58% of all of CableCom's customers are not satisfied with their service.
D
None of the above is valid.