GMAT Critical Reasoning (CR) | Re: Kooclaka is a full-line vending business, which uses vending machines

When they replace all Hospital VMs with 500ml bottles won't the revenue from bottles increase after the effect. ?
I don't think B is a weakener. E is also not a weakener. Even if visitors are visiting no guarantee that they will buy from people.
D is a little better option IMO.
daagh ,GMATNinja Can you tackle this question please.
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