A statistical analysis firm is hired to analyze the failure rate of a manufactured product. Which margin of error below would best indicate that the data used by the firm is a valid representation of the population?

Question

I don't understand the question they're asking me. The answers choices are: (I DO NOT want the answer just demonstrating what the question is)
2.1, 7.6, 8.9, 3.3
Why are these answers offered? What is it they are asking me?

Answer 1

2.1

Answer 2

lol M8

Answer 3

Read the question this is sort of common sense. If its valid (correct) then shouldn't the margin of error be small? If the failure rate is higher then something must be wrong.