They started using billboards i believe hope that helps
To ensure the elderly had income would be the best answer.
Answer:
The correct answer is B.
Explanation:
Genetic engineering is the process of using rDNA to modify the genetic makeup of an organism. So the correct answer is Option B.
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The Pope may have had a number of religious reasons to call this crusade. The most likely religious reason for the First Crusade was Urban's desire to establish peace in Western Europe. This whole concept may seem odd, since the Crusades were, essentially, a call to arms