Answer:c. No information provided
Explanation:
The fact that the house would be sold for $500.000 does not give us direct information about how much the seller was expecting, only what he or she accepted to sell it for, depending on the conditions it could mean they had no better offer and needed to sell it and therefore accepted what was offered even if it meant to lose a bit o gain much less that what they wanted, so since we are not offered information on the expectations of the seller we cannot say anything about it, then the other options are false, because it could even mean loss and no surplus.