:3. A box contains 10,000 flower seeds. Each seed is known to
grow either a white flower or a red flower. Four hundred seeds
are drawn at random without replacement and are sown; 121 are
observed to produce white flowers. A 70% confidence interval for
the percentage of white flower seeds in the box is best given as
being
a. between 28% and 32%

b. between 20% and 40%

c. between 25% and 35%

d. between 0% and 75%