which major from the list in American can get a high-salary job?

@wzsj0501 (157)
China
September 19, 2009 8:54am CST
my major is biology,which reseach plant disease and insects.this major is very difficult to find a good job.so I want to transfer my major which can get a high-salary job.I need a good job to earn money,to get married,to afford my family.a major is so important. now there is the list I want to change to: immunobiology,developmental biology,ecology and evolutionary biology,biomedical engineering,epidemiology and public health,forestry and environmental study,history of medicine, which major can get a good job?which major is difficult to find a job?
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