Answer:
The correct answer is option is c.
Step-by-step explanation:
Mass is defined as quantity of the matter contained by the body irrespective of its volume or any other forces acting on it.
Mass of substance Robert has =
= 4 grams
Mass of same substance Jill has =
10 grams
4 grams < 10 grams

Sample of Jill is more in weight that the weight of the substance of Robert.