Sasha's boss gets sick and she has to attend a meeting in her place. She is at the meeting taking notes for her boss when she is unexpectedly asked to summarize the progress of a project her division has been working on. Sasha speaks for several minutes regarding the project and then takes a few questions. The text would refer to Sasha's speech as employing: a. adaptive delivery b. manuscript delivery c. impromptu delivery d. extemporaneous delivery