Devastating earthquakes struck haiti in january 2010, forcing the native people to live under the most primitive of conditions. which one of the following forms of immediate aid would most likely prevent the outbreak of cholera and dysentery in refugees who were not seriously harmed by the earthquakes?
a) a large supply of clothing, dish soap, and toiletries
b) large supplies of rice and pots to cook the rice in
c) water purification systems and supplies of bottled water
d) tents and blankets to the people get away from the sun and keep warm at night

Juan and carol were studying invertebrates in biology. they knew that segmented or earth worms preferred a dark, moist habitat. during this lab, they would be investigating the responses of organisms called planaria or dugesia tigrina. these were simple flatworms that still had a one-way digestive system and a very simple nervous system. juan and carol placed the planaria in a petri dish containing cool, distilled water that was partially covered with black paper. they shined a light on the dish. next, they removed the paper and placed a small amount of chicken liver at one end of the dish. they added a few large salt crystals to the water. finally, they added drops of hot water to the cool water in the petri dish. their results can be seen in the data table. according to their experiment, all but one conclusion is valid.