Answer: D. The excessive cost of creating a new mission to the moon diverts funding from projects that would have more benefit to the public is the strongest claim Christopher can use in the argument.
Explanation: This claim highlights the opportunity cost of investing in a moon mission, which could have been used for other projects that have a more significant benefit to the public. It also suggests that the resources invested in a moon mission could be better used for other initiatives, such as education, healthcare, or infrastructure.