Which sentence in paragraph 4 is in the passive voice? Select one:
O a. (21) A variety of solutions has been suggested.
O b.(22) They address various aspects of the problem.
O c. (24) They suggest tighter controls on Internet use and the
installation of security cameras in teachers' offices,
O d. (25) These measures might help reduce cheating.

I think it is the last one

my brain

to me i think class room sitting education is better. i do online school and i have not learned a think haha. when i sit in the classroom i just sit there and kind of pay attention but still i get so far ahead in the class when im doing online i have nothing else better to do but play video games and i sit in school and learn and have friends and just actually learn. when i'm doing online i sit here listing to music and get on and and look up the answers i guess that is my fault for being a cheater. but to be honest i think sitting in the classroom is better.