A polling organization announces that the proportion of American voters who favor congressional term limits is 64%, with a 95% confidence margin of error of 3%. If the opinion poll had announced the margin of error for 80% confidence rather than 95% confidence, this margin of error would be:

3%, because the same sample is used.
Less than 3%, because we require less confidence.
Less than 3%, because the sample size is smaller.
Greater than 3%, because we require less confidence.
Greater than 3%, because the sample size is smaller.