This is a bad question.
The real answer is any of them may be the actual percentage, the true population mean. Probability and statistics often don't rule events out entirely; they just tell us some events are very unlikely. For example here all we know is there's a 95% chance the true percentage is within [tex]78\% \pm 8\%[/tex]. But there's a 5% chance it isn't, so those other percentages are still possible.
The question seems to want to ask which percentage falls within the 95% confidence interval. That's between 78-8=70% and 78+8=86% so the answer is
Answer: C 72%
