Asecondary battery is a battery that a. has been repaired following damage. b. can only be discharged once. c. is supplied with a fuel. d. can be discharged and recharged.

Batteries produces energies from redox reaction taking place inside them, they are of two types primary and secondary-

Hence, according to the question, D is the correct option.

i think its

"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.