Answer: B. Suppression
Explanation: Suppression in psycologically term is the act of trying to resist an action or thought of something by an individual. Thought suppression is the act of trying to shift the mind away from thinking about a particular issue. Psychologist point out that this act is not so effective as the mind is always drawn towards that which it's before forced not to think about unconsciousely. Ashton was trying to use the the Suppression of thoughts to ejects those disturbing thoughts.