The issue of slavery was avoided
Constitutional amendments can be proposed by the Congress with a two-thirds majority vote in both the House of Representatives and the Senate. Constitutional amendments can also be proposed by a constitutional convention called for by two-thirds of the State legislatures; however, the first way is the one that has always been used.
It is the Article V of the Constitution the one that prescribes how an<em> amendment</em>, which means an improvement, a correction or a revision to the original content, can become a part of the Constitution.
C is the answer to this question
I would say that it's a plain, and more specifically the European Plain (from France to Russia). Central Europe is really quite flat with only occasional mountain ranges.
The correct answer is letter A
Explanation: <u>Attrition</u> is a reduction in the number of research participants as some drop out of the study over time.