Complete the following sentence: With the model, the Public Administration delegates planning and realization of the project

Question:

Complete the following sentence: With the model, the Public Administration delegates planning and realization of the project to a private party, together with operating management of the facility for a given period of time. During this period, the private party is entitled to retain all receipts generated by operations but is not the owner of the structure:
a) BOT.
b) BOOT.
c) BOO.