The answer is the conclusion restates the thesis statement’s topic and viewpoint.
The two crops are olives and grapes. Olives were made into olive oil and grapes into wine
Lack of workers was not a problem that cities faced during the Gilded Age.
The economy and the government
Religious beliefs and practices, geography around Nile River and the creation of the Rosetta Stone, contributed significantly to the Egyptian security and stability. The only statement that did not contribute the the Egyptian's security and stability is the regular flooding of the Nile River.
The answer would be letter D.