多选题A team of programmers is reviewing a proposed API for a new utility class. After some discussion， theyrealize that they can reduce the number of methods in the API without losing any functionality. If theyimplement the new design，which two OO principle

A team of programmers is reviewing a proposed API for a new utility class. After some discussion， theyrealize that they can reduce the number of methods in the API without losing any functionality. If theyimplement the new design，which two OO principles will they be promoting？（）