Sound reasoning is essentially a valid argument/claim with evidence to back it up. The argument needs to be written based on true premises and logical fallacies shouldn't be present. A sound argument typically requires an explanation to back up a clear message. A mix of ethos, pathos, and logos are present in a sound argument.
The answer is A!! have a good day
Answer: C a treadmill
Explanation
In a gym why would you have a plate of food you should have that in a cafeteria. A book on boxing maybe but most likely in a library and a gutair stand in the music room.