Judith has invented a cell phone battery that lasts for two weeks without needing to be recharged. Some of her friends think she should just announce it to the world, and marketing isn't necessary. Other friends are recommending Judith look at segmenting the market which would help her to

develop protection from competitive pressures.

focus on those potential customers with the greatest need.

keep within a reasonable marketing budget.

ensure she will be able to patent the battery without letting the entire market know.