Out of 400 students sampled, 300 of them said that they hoped to have children someday. With 95% confidence, what is the approximate percentage of the students in the population who hope to have children someday?

A. 68.5% to 81.5%
B. 70.7% to 79.3%
C. 72.8% to 77.2%
D. 66.3% to 83.7%