The number of items in a product line represents the$\_\_\_\_\_\_\_\_\_\_$ and the total number of product lines a company carries represents the$\_\_\_\_\_\_\_\_\_\_.$

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Part $1$

A$.$

product mix$$ length; product mix depth

B$.$

product line$$ width; product mix length

C$.$

product line$$ length; product line width

D$.$

product mix$$ depth; product line width

E$.$

product line$$ length; product mix width