Which of the Following Is a Difference Between the T-Distribution

Multiple Choice

Which of the following is a difference between the t-distribution and the standard normal distribution?

A) The t-distribution cannot be calculated without a known standard deviation, while the standard normal distributions can be.
B) The standard normal distribution's confidence levels are wider than those of the t-distribution.
C) The t-distribution has a larger variance than the standard normal distribution.
D) The standard normal distribution is dependent on parameters like degrees of freedom, while t- distribution is not.