A confidence interval might be most appropriate during the early stages of a research project when little is known about the population's parameters and the project's researchers might still be gauging the parameters.

A) 90%
B) 95%
C) 99%
D) 100%

A 90% confidence

Step-by-step explanation:

99% confidence interval often used in scientific or medical research when making a wrong conclusion about a population parameter is very costly

95% confidence level in the field of statistics and is seen far more than any other confidence level

While 90% confidence interval might be most appropriate during the early stages of a research project when little is known about the population's parameters