While Watching Television Late One Evening, Marla Tuned into an Infomercial

While watching television late one evening, Marla tuned into an infomercial that claimed you could lose at least 5 pounds of fat each week by simply taking a natural herbal supplement. Suspicious, Marla conducted some research on the supplement and found that the sponsors of the infomercial were accused of presenting an irrefutable or nonfalsifiable claim. This means that the weight loss claim:

A) is supported by empirical evidence.
B) cannot be disproved or tested in any meaningful way.
C) is true, but only for certain people, such as those who are already physically fit.
D) has been tested in the laboratory.