Final answer:
The correct sentence that combines all the given statements is: 'The manager was reviewing her presentation while her assistant was setting up the technology in the conference room.'
Step-by-step explanation:
The correct sentence that combines all the given statements is:
The manager was reviewing her presentation while her assistant was setting up the technology in the conference room.
This sentence incorporates the actions of both the manager and her assistant in a single sentence using the time words 'while' and 'was', indicating the simultaneous actions that were taking place.