During a severe storm, electrical transformers that function independently are expected to operate 85 percent of the time. Suppose 20 electrical transformers are randomly selected from the population. Let the random variable

A. T represent the number of electrical transformers operating during a severe storm. Which of the following is the best interpretation of the random variable T ?

B. It is a binomial variable with mean 17 transformers and standard deviation √2.55 transformers.

C. It is a binomial variable with mean 17 severe storms and standard deviation √2.55 severe storms.

D. It is a binomial variable with mean 0.85 transformer and standard deviation 20 transformers.

E. It is a variable that is not binomial with mean 17 transformers and standard deviation √2.55​ transformers.

F. It is a variable that is not binomial with mean 0.85 severe storm and standard deviation 20 severe storms.