Why don’t lower-income groups participate more in the interest group system?

Which of the following was a key accomplishment of the people of songhai? a. they had a strong military and became the largest empire in west africa. b. they established a center of islamic scholarship. c. they worked with iron and prospered from the gold-salt trade. d. they dominated in the trade of ivory, enslaved people, and animal skins.

How has our understanding of the first sentence of the declaration of independence changed over time?

"there will be differences in degree of mood elevation seen in depressed clients after receiving either cognitive-behavioral or psychoanalytic therapy."; in this hypothesis, mood elevation is the: