Imagine a Balloon That You Blow Up to a Given

Multiple Choice

Imagine a balloon that you blow up to a given size (fill with a given amount of air at a given temperature and pressure) . What do you expect to happen if you pour liquid nitrogen (at 77 K) over the surface of the balloon? (Assuming that the pressure does not change significantly) .

A) increase slightly in size
B) decrease significantly in size
C) stay exactly the same size as before
D) One cannot say unless the composition of the gas is known.