Final answer:
Differentiated marketing is the best strategy for a small business selling handmade hypoallergenic soaps to consumers who are sensitive to mass market cleaning agents.
Step-by-step explanation:
The best marketing strategy for your newly established business would be Differentiated marketing, because you need to differentiate between consumers who are sensitive to mass market cleaning agents and those who are not.
By using differentiated marketing, you can target a specific market segment of people who are sensitive to cleaning agents used in mass market soaps.
This strategy will help you promote your hypoallergenic handmade soaps and reach out to the right customers who have a need for your products.