Both the novel and the radio versions of the war of the worlds have which theme in common? a. humans will someday be wiped out because of their greed b. people shouldn't believe everything they hear on the radio c. human vanity can cause a lot of problems d. martians have superior technology and weapons

C. Human in vanity can cause a lot of problems. Apex

When “War of the worlds” was presented as a radio show, the made adaptation, change the lines to become the podcast more interesting and make the people involved in the story, so it can look like a real radio news report, however both of them show an aspect of the story itself which is that human vanity can cause a lot of problems, the answer is C.

The answer that correctly uses the colon is the last sentence. Normally a colon is meant to be used when it is showing a list of options, but the first and second sentence only have one sentence after that. A colon also can show reasons why a person does something, but for the third option, there's only one reason. In the last statement, the colon is used to break up the statement. It also shows that Harry has something in account for what he wants in his life. So, your answer option should be "D" 

Hope this helps! 
   Singed, Liz