the author’s purpose in mentioning Wilhelm Roentgen and Henri Becquerel in "Marie Curie and the Discovery of Radioactivity"?

Critical reading what do you think keats means in these lines from "when i have fears that i may cease to be"? i may never live to trace / their shadows, with the magic hand of chance a. i may never live to paint pictures of them. b. i may never have a chance to look at them again. c. i may never leave the shadows as long as i live. d. i may never live to write about them. select the best answer from the choices provided