You and Your Exercise Buddy Decide to Go to Yosemite

Multiple Choice

You and your exercise buddy decide to go to Yosemite National Park to hike the famous El Capitan trail. You book your trip through a well known agency but before you leave for your vacation, you learn that there have been two cases of plague reported in people who recently visited a different area of the park. Your friend is anxious and tells you he thinks that plague is really dangerous and kills people everyone who gets it. He points out that this disease killed a lot of people during the Middle Ages, and says he doesn't want to do the trip after all. You decide to do some research on the plague and its causative agent before making a decision about your trip.
-Some arthropods cause disease even when they do not act as a vector. Which of the following is an example of this?

A) Scabies is characterized by an itchy rash caused by allergic reactions to female mites that have burrowed into the outer layers of skin.
B) The pubic louse is commonly transmitted during sexual intercourse and can cause an unpleasant itch associated with "crabs."
C) Dust mites do not transmit infectious disease, but inhalation of the mites and their waste products can sometimes trigger asthma.
D) The larvae of some mites are called "chiggers" and may cause intense itching where they attach and feed on fluids within skin cells. 
E) These are all examples of the situation described.