Hi you go to your email and press confirm and it will come back here to this site and it will auto confirm.
Except keyboard of F7 and Spell Checkbutton in toolbar, you are also able to apply Spelling check command fromExcel 2007/2010/2013/2016 Ribbon: Click the Review tab; Go to Proofing group; Then you will view the Spellingbutton , that's Spell Check command.
hope this helps
The answer would be B because ".edu" stands for education and it shows there was a source for the information