The correct option is D To be mindful of managing their image and themselves.
"Our social media profile reveals something about us and what we share depends entirely on us. The bottom line is that we control how the world perceives us." - this concluding line of the passage reminds the reader that since what we post online reveals something about ourselves, we should be careful about the image that we reveal to the world. In the given context of the passage, option A is thus the best answer.