An average student remembers about 50 percent of a ten-minute lecture when tested (2)immediately; and 25 percent of same lecture when testd fifty-five hours later.

a)No change
b)immediately -- and
c)immediately and

I chose answer c) since I didn't think a comma was necessary in this case.

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asked by nancy
  1. Where are the instructions of what you are eactly to do"


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  2. You're right. The comma is unnecessary.

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