4 Read the author's description of John Glenn's mission and Johnson's role in it in the second to last paragraph. How might the author describe Johnson's role in Glenn's mission? А A Glenn trusted Johnson's abilities as a mathematician, so she was central to his mission. B Glenn did not know Johnson so did not know whether she was good at math. Of d Johnson did not know about Glenn's mission until it was too late to help him. D Glenn was rude to Johnson, so she refused to help him with his mission.​