Alison goes to an all-you-can-eat restaurant. she has eaten three slices of pizza and is considering having another, but she is quite full from the first three slices. alison's consideration is an example ofa) incentives
b) scarcity
c) barter
d) marginal thinking

D) Marginal thinking

Explanation:

According to my research on macroeconomics, I can say that based on the information provided within the question Alison's consideration is an example of Marginal Thinking. This is when an individual begins to weigh the costs and benefits of taking a certain additional section of an action as opposed to the action as a whole. Which in this case the section would be one more slice of the pizza as opposed to the whole pizza or not having any at all.

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i bought a new phone

explanation:

i will send you the money when i get back from lunch

question - in 1827, john walker, a druggist in a small english town, tipped a splint with sulphur, chlorate of potash, and sulphid of antimony, and rubbed it on sandpaper, and it burst into flame. the druggist had discovered the first friction-chemical match, the kind we use to-day. it is called friction-chemical because it is made by mixing certain chemicals together and rubbing them. although walker's match did not require the bottle of acid, nevertheless it was not a good one. it could be lighted only by hard rubbing, and it sputtered and threw fire in all directions. in a few years, however, phosphorus was substituted on the tip for antimony, and the change worked wonders. the match could now be lighted with very little rubbing, and it was no longer necessary to have sandpaper upon which to rub it. it would ignite when rubbed on any dry surface, and there was no longer any sputtering. this was the phosphorus match, the match with which we are so familiar. according the paragraph what was the benefit of the new phosphorus match? it burst into flame when rubbed on sandpaper. it was made by mixing chemicals. it could be ignited on any dry surface. it threw fire in all directions.

answer - matches required natural chemicals