The correct answer is D. Descriptive
Step-by-step explanation:
Descriptive research is a type of research that aims at showing what occurs, this means descriptive research aim at describing a specific phenomenon in the population being studied. Additionally, descriptive research focuses on finding the frequency and average of a certain phenomenon or characteristics occurring in the population studied, and are these characteristics the ones that provide a description of the phenomenon. In this way, if the research purpose is to describe the behaviors of high school teachers, it can be classified as descriptive research as the main objective is not to understand why or when, but only to describe the way teachers behave.