In which of the following situations is it not appropriate to use commas? (a.)before a coordinating conjunction (b.)to separate items in a list (c.)to introduce a list (d.)to set off introductory material

In his nobel prize acceptance speech, elie wiesel uses ethos and pathos to achieve his purpose. describe wiesels purpose in this speech. then explain how he uses either ethos or pathos to achieve this purpose. be sure to use specific details from the speech to support your ideas.