Question $21(6\mathrm{.}67$ points$)$

Assume Zima buys notebooks in a competitive market. It follows that

a$)$ Zima has a limited number of sellers from which to buy notebooks.

b$)$ Zima will negotiate with sellers whenever she buys notebooks.

C$)$ Zima cannot influence the price of notebooks even if she buys a large quantity of them.

d$)$ Zima might have trouble finding notebooks at her local store.