Employment agencies, career fairs, and internet ads can all be sources of

   Job leads

Explanation:  All of the above options, i.e. sources, are sources of of job leads. Whether it is official information from employment agencies, career fairs, online ads, all this represents job leads for potential job. Each job lead corresponds to some of the abilities that are needed at that moment, so there is always the opportunity to find a job by following job postings and employment agencies official information.

answer: your mom

explanation: becuz

it was on the rise and doing very well and would continue to do well until the great depression from 1929-1939