You are writing a research paper on the dangers of e-cigarettes. One e-cigarette manufacturer's website claims its scientists have tested e-cigs and found them to be harmless. You should

a: use the information because manufacturers know their products
b: use the information because the e-cigs were scientifically tested
c: not use the information because a commercial website may present biased information
d: not use the information because you don't want people to use e-cigs