Which One of the Following Processes Does Not Occur During

Multiple Choice

Which one of the following processes does not occur during the convective transfer of heat within a container of air?

A) The volume of a warmed part of the air is reduced and its density increases.
B) A continuous flow of warmer and cooler parts of air is established.
C) The flow of air molecules results in a flow of heat.
D) The cooler portion of the air surrounding a warmer part exerts a buoyant force on it.
E) As the warmer part of the air moves,it is replaced by cooler air that is subsequently warmed.