Answer:
D.{15,23,25,38,53}
Explanation:
Replace f(x) with any other variables of your choice.
Substitute the value of the variable for the given set of hits
that is {4,12,14,27,42}
Solve for x for each value of the variable from the above set
Put all the solution for x in a set that is inside {,} brackets.
The correct option should be D