I think is yes because if they never occurred than no one would discovered or have those things they will have to try to make them by themselves
The letter that makes the Louisiana purchase is A
It can be said that "<span>A person with a Bachelor's degree (option C) is expected to earn an average of $52,200 each year. This is an undergraduate academic degree given by colleges and universities by the end or completion of the study. Depending on the career it might last between three or seven years. </span><span />
They provided financial support to young artists and writers in there time.
They used something called the Runic alphabet or Futhark.