Which of the Following Is Not a Disadvantage of Countertrade

Which of the following is not a disadvantage of countertrade?

A) Countertrade practices frequently restrict profit margins.
B) Price setting is difficult because not all cost factors are known in advance.
C) Prices are distorted as deliveries, which could take place over time, are made without reference to changes in technology.
D) Countertrade makes it difficult for consumers in low-income countries to have access to soft consumer goods.