Critical Reasoning (CR) | Mice that have been given morphine are very likely to

But doesn't B contradict with the premise?

The premise suggests that after giving Naltrexone along with morphine, there were much fewer incidences of blood poisoning but still some.

If Naltrexone inhibits bacteria from migrating to the blood stream, then blood poisoning should have been completely eliminated.

Hence, I followed the logic that there must be other conditions, which cause blood poisoning, that Naltrexone eliminates, thus lowering the number of incidences of blood poisoning but
...

---