Which of the following contributed to the spread of disease along the Oregon Trail? Select all that apply. (2 points) Responses allergic reactions to tallgrass prairies allergic reactions to tallgrass prairies colder air in mountains colder air in mountains crowded living conditions crowded living conditions lack of clean water lack of clean water unsanitary practices unsanitary practices mingling with Native Americans mingling with Native Americans caring for the animals
crowded living conditions
lack of clean water
unsanitary practices