I could be wrong but this one seems to make the most sense so D. none
The variable is the group that was given caffine, because thats what the doctors manipulated. They possibly altered the natural memory of the participants by giving them caffine. A more specific variable could be how much caffine each participant is given and what time are they given it.
martin Luther <span>john Calvin
</span>Protestant <span>Protestant
</span>theologian <span>theologian
</span>Christian <span>Christian</span>
Answer:
The answer is $3,975✔✔✔
Explanation:
The explanation is you multiply 11.5% and 3 which equals 10,965, so I subtract the answer became $3,975
