The government of an island nation has $7 million left in its budget and eight programs to choose among. Each program must be fully funded or not at all. Programs and their funding requests: Hurricane preparedness ($2.5m), Harbor improvements ($1m), School music program ($0.5m), Senate office building remodeling ($1.5m), Agricultural subsidy program ($2m), National radio ($0.5m), Small business loan program ($3m), International airport ($4m).

Question: If the legislature decides to fund the agricultural subsidy program, national radio, and the small business loan program, the only other single program that can be funded is:
Options:
A. hurricane preparedness, B. harbor improvements, C. school music program, D. senate office building remodeling, E. international airport
Answer: "D"