Apharmaceutical company claimed that experiments showed that its drug could effectively reduce the growth of cancer cells by 35 percent. however, when five independent laboratories conducted the same experiment, they measured a reduction rate of only 5–8 percent. how did these laboratories show that the pharmaceutical company’s claims were invalid?

Answer :  The labs were unable to reproduce the pharmaceutical company’s data.

Explanation : Any scientific claim must have reproducible experimental data. In this case, when the pharmaceutical company has the claim of reducing the cancer growth cells by 35% then by using the same manufacturing procedure for the drug and lab should be able to get this result. But they failed to match up with the results which clearly indicates that the labs were not able to produce the same results and hence they concluded that the pharmaceutical company's claims were invalid.

D. The labs were unable to reproduce the pharmaceutical company’s data

Explanation:

I took the test.