Utilize the input text as a context reference, choose the right relationship between Boeing and McDonnell Douglas from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

The 717 was the last jetliner developed by McDonnell Douglas before Boeing acquired the company 18 years ago.

Answer: subsidiary