Which word correctly completes the sentence? kat’s grades were so good that she was already herself as class valedictorian.

I think there should probably be choices to choose from, but I think I know which question this comes from:

Kat's grades were so good that she was already envisioning herself as class valedictorian. 

Also, if it is the question I am thinking of the choices are: 
envisioning
envisioned
visioning
revisioning

Hope this helps ;)