The correct answer is C. Inform
Step-by-step explanation:
The purpose of a sentence, paragraph or text refers to the main goal the writer want to achieve with the content of it and that can be classified as descriptive if the author uses details to create an image; persuasive if the author aims at convincing readers about an idea or action; entertain if the author wants to entertain the reader and informative if the text provides information that helps readers to understand an issue or situation. COnsierint this, in the case of the sentence "The trip to Mars is projected by NASA to take about 11 months" in this the author's purpose is mainly to inform as it provides information related to the trip to Mars which means through this information the audience will know more about the trip to Mars or will be informed rather than persuaded or entertained.