Answer:
D. imperfect information; disadvantage
Step-by-step explanation:
Imperfect Information is when parties in a transaction don't have fairly equal information about the quality of the product. This usually refers to when sellers have more information than buyers.
Eg : In case of second hand cars, sellers have more information about the real quality of car & buyers can only anticipate it.
Buyer anticipates the quality of good/ service, based on his / her evaluation about distribution of various quality of goods in the total range. However, this anticipation is subject to errors because of the 'imperfect information' he / she has, on the basis of which he / she decides. So, he/ she might pay more for a low quality good & hence might end at a disadvantage.