Answer: D. high tech and professional job opportunities
Step-by-step explanation:
The pull factor exists in the United States to encourage educated professionals to immigrate to the country is high tech and professional job opportunities.
Due to the Advent of new technology, lower skilled workers have been put out of work and this provides opportunity to the
high tech and professional workers. Thus, the presence and establishment of high tech industries in the country attracts immigration of high tech and professional workers into the United States.