State whether the function is a probability mass function or not. If not, explain why not. p={(8,0.6),(9,0.8),(10, -0.4)} Select all that apply. A. p is not a probability mass function because it does not satisfy the third condition of probability mass functions. B. p is a probability mass function. C. p is not a probability mass function because it does not satisfy the second condition of probability mass functions. D. p is not a probability mass function because it does not satisfy the first condition of probability mass functions.