What Is the Most Important Issue Facing the Next President

Multiple Choice

What is the most important issue facing the next president? In a January 2016 survey of 1022 adults, the Gallup organization found that Republicans and Democrats agreed on the top four issues, and terrorism was reported as the top challenge by 17 percent of respondents, with a margin of error of plus or minus 4 percentage points at 95 percent confidence level.
In this sample, the margin of error is:

A) 170.
B) 95 percent.
C) 17 percent.
D) 4 percent.