What is a current world issue that is concerning y'all ?

Which of the following is a complex sentence? a. after henry submitted his essay, he realized that he hadn't proofread the last page. b. identity theft is a growing problem, especially among seniors. c. we didn't have enough potatoes for dinner, so we served rice instead. d. jim tried to watch a video on a device connected to a crowded wireless network; as a result, the video stuttered and froze.

Although the account is in good standing at this point in time. is this sentence incomplete or complete?

What do u think u might go with a bestfriend that u don’t do with everyday friends( school friends)