text completion question

Question

A salesman working at a clothing store lays out the following argument:

Premise: “None of the customers that I have spoken to in the store have purchased our new red rain boots. And I have spoken to quite a lot of customers!”
Premise: “___________________________________”
Conclusion: “These new rain boots have earned us no revenue thus far and ultimately lost us money. Let’s stop producing them.”

Which of the following premises below, when combined with the preceding premise, would produce a conclusion that is true?

1) “The woman over there is in our store and will not want to buy the red rain boots.”
2) “I’ve also checked with corporate headquarters and so far no units of the product have sold at any of our locations.”
3) “The only way customers will take them is if we give them away for free.”
4) “But the boots may have been purchased by customers that shop online.”

Answer 1

Premise: "But the boots may have been purchased by customers that shop online." This premise would indicate that the conclusion is true because although no sales were made in the store, one can only make an accurate decision by verifying all online sales for the red rain boots.