12. According to a Leger Marketing survey of 631 Canadians under the age of 40, 322 respondents believe that their future prospects compared to their parents' generation are better. Determine the lower limit of a 95% confidence interval and the margin of error for the proportion p of Canadians under 40 who feel this way.

a) 47.76% and 3.3%

b) 47.13% and 3.9

c) 48.17% and 2.9

d) 45.9% and 3.9

e) 47.13% and 3.3