Answer: Bringing along a senior executive to the business negotiations
Step-by-step explanation:
Regarding the question, we are told that Next Step Global is a consultation firm which specializes in the preparation of businesses for international negotiations.
The likely action Next Step Global will most likely recommend to a negotiator in order for the negotiator to have influence at the headquarters will be for the negotiator to go along with a senior executive.
Going to the headquarter with the senior executive gives the negotiator an edge and also gives him or her the needed respect. Also, during negotiation the senior executive might be of help due to the better experience the person possesses.