The correct answer is D. They have been made over time.
Step-by-step explanation:
A constitutional amendment is a modification to the constitution often because new articles or sections are added. In the case of the United States Constitutions, since its ratification in 1789, there have been twenty-seven amendments. The first ten amendments that are part of the Bill of Rights were ratified two years after the constitution at the same time; however, other amendments have been made over time from 1975 to 1992, based on social changes and the need of modification in law. Considering this, the true statement about the amendments to the Constitution is that they have been made over time.