Object 3 has the greatest mass because of its largest surface gravity.
Answer: Option C
Explanation:
The parameters given in the table like orbital period and surface gravity depends on the mass of the object. But the orbital period also depends on the radius of the orbital path and it is more dominant than the influence of mass on the orbital period.
The mass can be stated based on the surface gravity which is directly proportional to the mass of the object and inversely proportional to the radius of the object. So as the surface gravity of object 3 is the largest among all the five objects, the mass of object 3 will be the greatest as per the given table.