Casey has been studying all week for his biology final. he studies until he is ready to go to bed because he knows that information presented within before sleep is less likely to suffer from retroactive interference.

1 hour

Explanation:

Firstly, retroactive interference is the effect of new memories holding back a person from keeping older memories. According to my research many scientists believe that if you study or read certain information 1 hour before going to sleep it greatly reduces the likely-hood of suffering from retroactive interference. Therefore it will help you remember what you read for the test the next day.

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the answer is either c or d i think its d

industry had made the u.s. the richest nation in the world at this time. the second industrial revolution caused growth in industry and transportation, which allowed increased trade between nations. click to let others know, how is it