Answer:
d. independent samples t-test for means.
Step-by-step explanation:
The technique independent sample t-test for means is an statistical tool used for calculating a difference between two mean values calculated.
As in the given instance there are two types of sample population which represents different samples.
Thus, they shall be compared effectively with this tool so that the more favorable option shall be chosen properly.
The independent t-test sample mean is helpful in this instance.