What is the prepositional phrase in you must not go until friday

Social media teens who are shy connect with other people. social media gives them a place to make friends. fifty-three percent of teens self-identify as shy. shy adults also cite social media as a comfortable place to interact with others. more than 25 percent of teens report that social media makes them feel less shy; in addition, 28 percent report feeling more outgoing, and 20 percent report feeling more confident. which piece of evidence would better support the claim? social media gives teens a place to apply for work. sixty percent of users report making new friends through social media. teens can be anonymous on social media. most teens understand how to use the internet safely.