I am not sure but here is a guess I think it might be C- earth's magnetic field reverses
Marijuana is the answer because it just is and i have seen studies so just trust me
Answer:
Data is manipulated by using the arithmetic instructions in digital computers. Data is manipulated to produce results necessary to give solution for the computation problems. The Addition, subtraction, multiplication and division are the four basic arithmetic operations.
Sense Eddie clicked the undo command he wouldn't want to click it again, if he does more words will leave. Sense he did not copy the word, he cannot paste it. And if he would press Undo twice, then that would take him back further, so what he wants to do is click the redo command.
Hope this helps.
<u><em>Marcy~</em></u>