This probably means that something you had planned to turn out well, ended up going against you. The scenario flipped it's self around and you were so said "betrayed" by your own plan or game.
Answer:
I think that social media should be higher security. So many kids under the age of 13 are on it. There are many predators attacking young children. It is an unsafe environment. Many kids get groomed each day on social media.
Explanation:
Sentence D is different from the others.
The other options (A-C) begin with a dependent clause and a comma - option D does not.
