Answer :
The final tactic that Antonio is using to save his business is called domain selection.
What is domain selection?
Domain Selection means entering an existing market with existing expertise. It refers to the diversification of an investment in a different product, business or area.
Business or companies employ the domain selection basically to try other avenue for their business progress rather than continuing on the initial businesses that they engage in.
Hence, Antonio is making use of domain selection in order to save his business.
Learn more about domain selection here: https://brainly.com/question/1364836