Is this option correct ? If not then which one is right? Please help. Thanks

Suppose that demand follows N(50,10) distribution in a newsvendor problem. The Q value changes based on the values of Cu and C o as illustrated below. What happens to Q if Cu approaches infinity, while Co remains constant at 1 ? Stays constant at 64.26 Increases up until 1000 and then stays constant Increases initially but stabilizes at a certain value Never stabilizes, and it approaches infinity