When he was very young, William took an intelligence test as part of a research study. Decades later, William is asked if he would be willing to take another intelligence test in order to test the stability of intelligence. By agreeing to take another intelligence test, William is engaging in a(n) study.

always include the steps and/or background required to get to the final answer. let’s other people understand and solve future problems on their own.

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.

answer; direct observation;