Passage Summary: There are lots of cheap pythons from Africa in stores right now, but they are much more likely to have a hidden, fatal disease than local pythons, and infected snakes die quickly.

Reasoning: A recent influx of African pythons has lowered prices; African-hatched pythons have a higher rate of a fatal, hard-to-detect liver disease than North American ones; the disease kills within six months.

Analysis: Since this is a 'Must be True' question, we need to combine the facts without making any outside assumptions. We know there's a higher risk with the current cheap stock because they are largely African-hatched. A safe inference would likely connect the recent influx of cheap snakes to a higher probability of those snakes dying soon from the disease compared to the North American ones. Treat the premises as absolute rules and look for the most logical deduction.