Context: I take the case of soda to the sink for examination . All 12 cans of soda were only partially filled with liquid . Some contained as little as 25 % soda ! All the extra air seems to have oxidized the can from the inside , and after some time the can could no longer withstand the pressure and it would pop it 's top . Three other cans had already burst , but not in a location that would cause any spillage .

Question: What may have been the reason there was very little liquid in the cans ?
Options:
0. Someone popped the top on the cans and poured it out so only 25 % of the soda was still in the can .
1. None of the above choices .
2. It may have been a manufacturing error that there was not enough of the beverage in the can .
3. Someone shook the cans really hard so the can burst and the soda came out all over the place .
Answer: 2