Answer:
1.9 billion people use social media actively
I had to look for the options and here is my answer:
Based on Seth's graduation project which is about conditioning a monkey to fear a flower, she might consider coming up with a different plan because the monkey does not possess any biological predisposition to be afraid of a flower, which makes this project difficult to achieve or rather impossible.
To extended the Roman Empire around the south
B because its important to have groups to callaborate together :)
