The answer is A. Coffee is an example of a luxury crop.
Luxury crops are also known as high value crops, or non-traditional crops; they are defined as those crops that have higher market values and generate more profit per acre than traditional cereal crops that form part of the customary diet of the local population.
Coffee, garlic, lavender and gourmet mushrooms are examples of crops that have higher income per unit of resource used for their production.
However, President Eisenhower issued Executive order 10730, which federalized the Arkansas National Guard and ordered them to support the integration on September 23 of that year, after which they protected the African American students.
The large stone structures created by the Neolithic Europeans are called the Stonehenge. It was built around 4500 - 4000 years ago. It's a circle of stones also known as the megalithic monument.
