D none of the above is what the answer is
Answer:
As a result of the rule limiting the size of the House of Representatives to _435 members, U.S. congressional districts on average now have very substantial populations
The answer is C their advancements in farming and high tech equipment
Historians are most likely to study written records because they study history.
Geologists study solid and liquid matter that make up the earth as well as history that has shaped it.
Archaeologists study the history based on artifacts, monuments, etc.
The wheel, plow, and writing (a system which we call cuneiform)