Factors that have contributed to heterogamy include a. higher college enrollments. b. geographical mobility. c. participation of women in the work force. d. all of the above

The answer is D.) All of the above ^-^

world bank is the correct answer.

d - failures.

the only attempted british colony in north america before 1600 was roanoke, virginia, which was a total failure. england claimed several areas, including newfoundland, but made no sustainable attempts to colonize them before 1600.