Which one is not an oxymoron? HELP ASAP

Read this passage.my career in journalism has taught me the challenges of capturing sporting events, yet gregor powell's descriptions are flawless. powell is a gold-medal paralympic swimmer, but his memoir proves that his true strength is the power of his insights.what feature distinguishes this passage as a foreword?

Emily is reading her friend's story. it uses transition words like and emily can tell that this story's organization is a) sequence of events b) cause and effect c) compare and contrast d) question and answer

Acredible source is one that is (4 points) select one: a. with bias b. not useful c. persuasive d. trustworthy