Which of the following is primary source? a. a texas history textbook b. a documentary film about the trail of tears c. a biography of alexander graham bell published in 1995 d. a love letter written to john adams from abigail adams

D. a love letter written to John Adams from abigail adams

This is because the letter was written by the direct people and isn't second hand information.

disequilibrium means that either supply is greater than the demand for an available good, or that the demand for a product outstrips the available supply. it implies that the price for a is either too low creating large demand, or too high creating a large surplus of supply.

which question?

explanation:

which question r u talking about?