Scientists have learned a great deal from manned space flights. One unexpected discovery has been that humans are not well adapted to life in space. Life without gravity causes the fluid in a human body to float upward, which not only creates uncomfortable pressure in the head and chest, but also weakens the leg muscles. Long space missions can also cause astronauts to develop brittle bones, vision problems, and difficulties eating and sleeping enough. NASA hopes to send astronauts to Mars in the 2030s. Scientists calculate a trip to Mars would take around 2.5 years. To date, the longest a human has lived in space is 438 days, a feat achieved by Russian cosmonaut Valeri Polyakov on the Mir space station in 1994–95. Write a one to two sentence conclusion appropriate to the purpose and audience of the passage.

Announcer two: ladies and gentlemen, following on the news given in our bulletin a moment ago, the government meteorological bureau has requested the large observatories of the country to keep an astronomical watch on any further disturbances occurring on the planet mars. due to the unusual nature of this occurrence, we have arranged an interview with noted astronomer professor pierson, who will give us his views on the event. in a few moments we will take you to the princeton observatory at princeton, new jersey. we return you until then to the music of ramón raquello and his orchestra. the passage is from the transcript of the radio adaptation of the war of the worlds by h. g. wells. instead of including expert interviews, h. g. wells uses a narrator to tell about an alien invasion that occurred a few years earlier. by including expert interviews, how does the radio broadcast change the story most effectively? o.a. it puts the story in the past tense, increasing its personal tone. o o b. it makes the broadcast sound more like a fictional story. o o c. it makes the broadcast sound like a news report. o d. it makes the story sound less believable by changing who presents the story's details.