Which of the following choices are important characteristics for fitness center staff? A. certified B. friendly C. helpful D. all of the above Please select the best answer from the choices provided. A B C D

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explanation:

the technology changed agriculture in an impacting manner since many people left the field work by a cellular or other technological appliances

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muslims have taken his goods and products to different parts of asia an indonesia. sometimes just traveled and trade, but in other occasions, stayed in the place and made a living.

trade was the key for muslims economies to prosper. their commerce routes reached far places like malaysia and java in the 11th century.

another important factor for prosperity was that muslim states served as the middle point for european traders.

they used to travel by land but sailing the seas -the indian ocean- really increase the exportation of products.