When filling a position with a person outside the organization, which source is most likely to supply candidates who know the business well, have had relevant training, and have some knowledge of rival firms in the industry?

what are the sentences? so we can answer the question.

agriculture and oil. natural resources, industry.

the first successful, urban blues recording, selling more than 75,000 copies, was made in year 1920.

mamie smith recorded the first commercially successful example of the urban blues,   with the recording of “crazy blues”."crazy blues" was recorded on august 10, 1920, in new york city. within a month of the release of “crazy blues” it had sold 75,000 copies.

107x106 is the answer