When an oxygen atom forms an ion, it gains two electrons. what is the electrical charge of the oxygen ion?

a.
+1

b.
-1

c.
-2

d.
+2

"i have always loved contemporary art and made it a general goal to work within the field. after a few nonprofit internships at museums and galleries, i decided to try the for-profit art world and was offered a job as the ad assistant at the magazine. i much prefer the pace of the for-profit art community and have stayed with the company for three years, with a promotion to an account manager last spring."

i just did this and got a 100.