The Country of Aceland Produces Two Goods,televisions and Computers

Multiple Choice

The country of Aceland produces two goods,televisions and computers.Last year,it produced 200 televisions and 500 computers.This year,it produced 250 televisions and 600 computers.Given no other information,which of the following events could not explain this change?

A) Aceland experienced a reduction in unemployment.
B) Aceland experienced an improvement in computer-making technology.
C) Aceland acquired more resources.
D) Any of these events could, in fact, explain the change.