Answer:
correct option is c. 5 utility units
Step-by-step explanation:
given data
receives 20 units = consuming 2 candy
receives 25 units = consuming 3 candy
to find out
Marginal utility
solution
we know that Marginal utility of 3rd candy bar is express as
Marginal utility =
.........1
put here value
Marginal utility =

Marginal utility = 5 unit
so correct option is c. 5 utility units