"ms. higgins implemented a reinforcement plan with her language arts class. she also implemented several plans for individual students. behaviors improved for a few days and then student behaviors began to deteriorate. what should ms. higgins do now

Based on the scenario above, as it shows that her reinforcement plan worked for a few days as it has improve her students behavior but it deteriorates after, what she should do to keep the behavior to improve and prevent it to deteriorate is to follow a problem solving steps to determine the problem and examine the plan to determine which is best to be employed.

the answer is:

c. economic output

for many centuries there were important factors which the economies of the muslim empires developed increasingly. they applied economic procedures in production, investment, finance, taxation and property. they used to tax certain goods (for example: harvest), they charged interest on money lent, they signed contracts with merchants; they relied on a common currency, and they used checks as well as promissory notes. with the money collected by means of taxation, the government provided the needy with an income. in addition, trading networks covered huge distances, so far regions started to have contact and exchange goods. this trade network covered areas of asia, africa and europe.