A product whose EOQ is $40$ units experiences an increase in ordering cost from$$ $$10$ per order to$$ $$90$ per order. The revised EOQ$$ is:

Part $2$

A$.$

nine times as large.

B$.$

$$one$-$ninth as large.

C$.$

$$one$-$third as large.

D$.$

three times as large.

E$.$

cannot be determined