Aerojet Vice President Julie Van Kleeck declined comment on reports that Aerojet has offered $2 billion to acquire United Launch Alliance (ULA), a 50-50 rocket launch venture of Lockheed Martin Corp and Boeing Co.
Take context from the input text and decide on the accurate relationship between 'Lockheed Martin' and 'United Launch Alliance' from the options provided.
Options: owner of, subsidiary, location of formation, product/material produced