This one is straight to the point and easy to understand.

A doesn't make assumptions or judgments.

A is more direct and I like that it tells me how quickly to expect results.

Having the time makes me realize how fast and convenient this product is.

The time being listed makes it more clear what the point of the product is

I like this one, it’s more too the point, easier to understand.

A. Lets me know its fast results and easy to test for fent.

Oh it's choice A all the way as choice B can sound misleading and makes it sound like okay to use drugs

Including the time is I believe important. Also, I feel like "use substances safely" may be interpreted as actually supporting the use of intoxicating substances, which is probably not great.

I think how quickly the results come in for the test is important for drug consumers

I think this one does the best to let you understand what the product does.

in just 5 minutes is a powerful way to advertise the product for fast testing.

I like the fact that the ad actually warns you to use substances safely, further emphasizing its use in testing for fentanyl.

Option B, because it mentions safety, which is super important for fentanyl.

This shows that fetanyl is unsafe and testing for it makes it safer