Answer and Explanation:
An investment when it would be risk free in that case both the principal and the interest amount are to be paid within the prescribed time. Also when the U.S government bonds i.e. long term would be issued by the government have a lesser interest rate as compared with the other riskier securities available at the market place this is because as the government would default next to zero in case of the short term it would make the default when there are extreme situations arise.
Therefore in the short term it would be risk free
But in the long run, the person is based on the treasury bills returns so that he or she could equate the similar standard of living also it would not suffice when the inflation rises
Therefore the less risky investment would be of Government bonds