Why did the price of prerecorded cassettes fall dramatically when compact discs became widely available in 1991?

Because CDs are better than tapes (for a multitude of reasons). Before CDs, manufacttureres could sell tapes at high prices because there was no better alternative. However when CDs were invented, if taped had stayed at the same inflated prices, nobody would have bought them, so the price had to come down or manufacturers would have loads of tapes priced really high, competing with (better) CDs.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.