Answer:
The answer is the second one.
Explanation:
I say this because the second one sounds more formal and makes more sense.
Bhhfdsaaeryuuiiolljjhgggfdszxccvbbnn
Pros : allows the students and teachers to experiment more , making learning fun and effective .
cons : can be distraction , possible disconnect of social interaction .
No change because the rest are basicly repeats
