Americans may be more likely to exercise 30 minutes a day if they broke it up into several intervals
The author mentions confusion, not boredom. The author cites the necessity of gym membership as an imagined barrier to exercise, which could involve the cost. The media is cited here as one source of misinformation about exercise.
B Americans may be inactive because they are bored
C Americans are not influenced by infomercials, magazines, or videos
D the cost of gym membership does not matter to most people