Respuesta :
The accurate descriptions are: A, B and C.
A: The colonists had not carried out the work in the springtime needed for the haul, such as building up food stores and digging a freshwater well. Later , a combination of bad water from the river, disease-bearing mosquitoes, and limited food rations created a wave of dysentry, severe fevers and other serious health problems and numerous colonists died. This showed their lack of knowledge and experience on how to mantain a colony.
B: African slaves appeared for the first time in Virginia in 1619, brought by the English. With the help of the slaves, Virginia planters developed the commodity crop of tobacco as the chief export. It was an extremely intensive labor, and there was a huge demand for it in England and Europe.
C: The Pilgrims could survive thanks to the help of native americans who helped them. They took the Pilgrims to unknown places for their profit and taught them how to plant corn and where to fish. Without the assistance of Native Americans, the Plymouth colony most likely would have perished.