Xi returns late from a client visit and finds that the office is empty. He doesn't know if Ahren, Witi, both, or neither had come to the office that day, but he recalls that the wastebasket was empty...

Xi returns late from a client visit and finds that the office is empty. He doesn't know if Ahren, Witi, both, or neither had come to the office that day, but he recalls that the wastebasket was empty early in the morning, before any employees had arrived. Given this information, how many of the following statements are true?

I. If Xi sees 1 cup in the wastebasket, then his probability that both Ahren and Witi were in the office that workday is greater than 0.1.

II. If Xi sees 2 cups in the wastebasket, then his probability that only Witi came to the office that workday is 0.4.

a. I only

b. II only

c. Both I and II

d. Neither T nor II