Answer:
B. 4 doz
Explanation:
[tex]\text{Amount of eggs}= \text{9 cowry shells} \times \dfrac{\text{1 doz eggs}}{\text{2 cowry shells}} = \text{ 4.5 doz eggs}[/tex]
"They" won't let you buy a fraction of a dozen, so you can afford to buy only 4 doz eggs.
