Answer: Wholly owned subsidiary
Explanation: An entity whose entire shares are held by its parent company are called wholly owned subsidiary companies. The management of such companies are different from the parent companies, but the parent companies still have a very strong indirect influence on such entities.
In the given case, Jupiter system wants to hold on to its unique technology, therefore, they should go for subsidiary structure as they will have complete control in such system.
Hence from the above we can conclude that the correct option is A.