In your text your authors discuss how research was conducted by the disposable diaper industry that demonstrated that disposable diapers were no more harmful on the environment than cloth diapers. The cloth diaper industry found just the opposite

The point of this example is:
A) research studies are always objective and are conducted to provide the truth
B) when evaluating research studies you should understand that some studies are conducted with a clear purpose in mind to "prove" some position or advance some special interest
C) chambers of commerce have always been able to clear up discrepancies between research studies
D) if you are really concerned about the environment, don't wear any type of diaper
E) secondary data be discarded because those collecting it always have a hidden agenda

B