Participants in one experiment were given entirely fabricated accounts of an occasion in which they had been lost in a shopping mall during their childhood. Many of these participants later falsely recollected vivid details of the experience as having actually occurred. This experiment best illustrated

(A) The misinformation effect; remembering things that didn't occur

Explanation:

The misinformation effect is the state in which the after-information related to the event gets attached with the memories about the real event. This effect is an example of the influential nature that the memories have. The after-information illustrates the piece of dramatic effect on the memories stored in the mind of the people.  

In the given excerpt, the misinformation effect has been illustrated. The recollection of the details that have not even occurred in real gives the example of the effect.

the act of deciding on matters of the economy. economic decision making is routinely conducted by finance ministers, economic advisors, heads of major central banks and business leaders and can have profound effects on a major economy.