Elena works for a company that handles product testing for a company based in germany. this work is an example
which companies use to
by contracting some business activities to other businesses
1) a. marketing
b. outsourcing
c. trade agreement

2) a. product demand
b. production costs
c. tariffs

b. Outsourcing

b. Production costs

Explanation:

This is an example of outsourcing. Outsourcing is a practice that is often employed by companies in order to reduce production costs. This practice consists on hiring an outside party in order to perform services that would normally be provided by the company itself. This can include a wide range of tasks, from customer support to manufacturing.

the difference is that white collar worker performs skills like worker as a scientist or well blue collars do physical work and they do services like being a cook.

the answer is mass marketing.