Final answer:
The mean and standard deviation for the length of a zebra pregnancy, which follows a normal distribution, are 379 days and 10 days, respectively. Hence, the correct choice is option A.
Step-by-step explanation:
The question asks about the mean and standard deviation of the length of zebra pregnancy, which follows a normal distribution with provided mean and standard deviation values. Neither the mean nor the standard deviation changes when observed for a single event. Hence, if we are to observe just the zebra pregnancy, not an average of several pregnancies, the mean remains the same, and the standard deviation is also unchanged.
The correct choice, therefore, is A. Mean: 379, Standard deviation: 10.