Which of the following is NOT true about theory based confidence intervals for a population proportion?

A. They should only be used when you have at least 10 successes and 10 failures in your sample data.
B. The process used to construct the interval relies on a normal distribution.
C. They can be calculated using different confidence levels.
D. For a given sample proportion, sample size, and confidence level, different intervals can be obtained because of their random nature.