Answer: A
The national debt is over $15,000,000,000,000.
We use our rule that 1000 ≅ 10 bits.
The national debt requires 44 bits: 4 * 10 bits for 1,000,000,000,000 and 4 bits for 15 (24 = 16).
Both int and Integer are 32 bits, which can represent ± 2,147,483,647, not even close to the national debt.