Final answer:
The given data does not provide enough information to calculate the covariance.
Step-by-step explanation:
The question asks for the covariance between stocks A and C, but the given data is a list of numbers that is not labeled. In order to find the covariance between stocks A and C, you would need to know the returns of each stock over a given period of time. The given data does not provide enough information to calculate the covariance.