How to mark someone for brainliest

when 2 person give u the answer,, there u will se giving brainliest option.. just click on it the one's answer u wanna giving brainliest

Explanation:

and there u go

Once u get more than 1 answer of a question. A message is shown above each answer that is “Mark as brainiest”. Click on the option to mark it the best answer.

i think its account a

the answer is not negative reinforcement.