Explanation: technology can be a good thing in a sence of helping people remember to do things like take their meds. It can also help modeter peoples health like their heartrate, how many steps they take, and how well they sleep. It however can be a bad thing consitering it makes people put less effort into their daily life, instead of picking up a book and looking for an answer you can just sit down and look it up on your device. Little things like that dont seem like a lot but they can build up and cause people to get lazy.
The correct answer is D. A prepositional phrase means that it starts with a preposition. And in these examples, D is the only one that starts with a preposition "on".
