Which of the following is a promise advertisers cannot make promoting their fitness product?

"you can improve your cardio with our three days per week dance lessons."
"you can strengthen your core completing the ab work series."
"target your belly fat to lose weight there first."
"shape and tone with our muscular endurance videos."

"Target your belly fat to lose weight there first."
 Of the four, this is what advertisers cannot make as a promise when it comes to promoting their fitness product. There is simply no guarantee that anyone who uses their product would lose weight. And should they lose weight, there's no guarantee that the first to be shed off would be the belly fat area.

The answer would be true.