Martina manufactures noise-canceling headphones for a market that

values quality. Each pair is made from high-quality components. In
addition, each time a customer buys a set, she donates 25 percent of
the proceeds to an organization that supports hearing disability
research worldwide. How is she MOST likely segmenting her target
market?

by psychographics
by geographics
by demographics
by behavior

Martina is most likely segmenting her target market by psychographics. This is because she is targeting customers who value quality and are likely to be interested in supporting a cause related to hearing disability research. Psychographics focus on individuals' attitudes, interests, values, and lifestyles, which align with Martina's approach to appealing to customers who value quality and social responsibility.