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I would say B, because it lists all the powers first, then says they're gonna change it.
Answer:
retroactive interference
Explanation:
A retroactive interference can be described as a difficulty in recalling an older information as new information gets in it's way. An new information is being stored of the same type, the previous ones get lost.
The same problem of retroactive interference was observed in Pete when he was unable to recall the names of his previous students as he had the new information of remembering his new students names.