As the National Debt Grows as a Percentage of the U.S

As the national debt grows as a percentage of the U.S. economy, which of the following is (are) true ?

A) ​ Future U.S. citizens will be forced to spend a larger percentage of their tax revenues on servicing the national debt, limiting the money that is available for health care, education, and national defense.
B) ​ If today's deficit spending is primarily designed to benefit people today, and is not being invested to make the economy grow, then we are robbing the future for the sake of the present.
C) ​If rising levels of federal borrowing today crowds out private borrowing for productive investment, then economic growth in the future will slow, and future living standards will fall.
D) ​All of the answers above are correct.​