Answer: niche marketing
Explanation:
The marketing strategy that would work best for her small company is the niche marketing.
Niche marketing is a strategy whereby the company focuses on a unique target market rather than focusing on the whole market as a whole. It is regarded as a segment of a larger market that has its own preferences and needs.
Since business has grown slowly, and her resources are fairly limited, the company can focus on a particular segment in the market using the niche marketing.