If there is a technological advance that lowers the cost of producing x-ray machines, then we can say that the

C) quantity supplied of those machines will go up.

Explanation:

the options are missing:

A ) quantity demanded for those machines will increase.

B) demand for those machines will shift right.

C) quantity supplied of those machines will go up.

D) quantity supplied of those machines will decrease.

If production costs decrease, the supply curve will shift to the right, increasing the total quantity supplied while decreasing the sales price. Advances in technology increase productivity, which allows companies to supply a higher amount of goods at lower prices, which in turn increases the total quantity demanded for these goods.