The correct answer is <span>one clenched fist. The size of a fist would be used as a unit of measure, which was common at that time where people also used elbows and thumbs for size. Foot comes from old times and is still used today, just like stones. These are archaic sizes before the metric system.</span>
Explanation:
Changes to the government are called Amendments.
There have been 27 changes so far, or, there are currently 27 Amendments. The first 10 Amendments are called The Bill of Rights.
An advantage is that it takes way less time to do it than to create a formal treaty since the President would not need consent from the congress for an executive agreement. A formal treaty can, however, last longer because it is more difficult to cancel, so if it's good, then it is also safer for it to be formal.