64 LR One Question 22
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Is answer choice A wrong because it's not talking about heavy metal causing antibiotic resistance? Instead it's kind of implying the sewer is causing the resistance to both?

Yeah, that's certainly one possibility. (A) also leaves the possibility that the antibiotic resistance somehow creates a resistance to heavy metals, among other explanations.

I would like to ask answer A again.
The argument goes (heavy metal) -> (resistant to antibiotics). So the contra-positive of the argument is exactly the one described in A, isn't it? So, I chose answer A, though...

This is tricky!
I think you have maybe conflated metal resistance in (A) with the metal contact the passage claims is the cause.
(A) would be a more persuasive answer (and would reasonably tighten up the correlation) if it said "Most bacteria that are not resistant to antibiotics have not had contact with heavy metals."
See the difference?

damn! so that's why A was wrong, change in focus...kinda a dick move