What are the$$ company's options?

A$.$

$($a$)$ increase the estimated useful life of the$$ machine, or$($b$)$ purchase an additional machine in order to meet demand

B$.$

$($a$)$ leave demand in excess of the current capacity$$ unfilled, or$($b$)$ purchase an additional machine in order to meet demand

C$.$

$($a$)$ leave demand in excess of the current capacity$$ unfilled, or$($b$)$ hire additional workers to fulfill demand

D$.$

$($a$)$ have employees work overtime in order to meet$$ demand, or$($b$)$ lower the sales price in order to increase demand