Final answer:
The total weight of the jet belt and man is the sum of (b) their individual weights, as the combination of two objects' weights leads to the resultant weight.
Step-by-step explanation:
The total weight of the jet belt and man is the sum of their individual weights. According to the principles of physics, specifically those concerning mass and weight, the combined weight of two objects is the sum of their individual weights.
When we add these weights together, we get the resultant weight, which would be the total weight that the jet belt and man system would exert on a surface or scale should they be measured together.