Final answer:
When conducting a search of a building at a break and enter investigation, if the suspect most likely entered through a second-story window, the next action is to determine the entry and exit points.
Step-by-step explanation:
When conducting a search of a building at a break and enter investigation, if you determine that the suspect most likely entered through a second-story window, the next action you should take is to D) Determine the entry and exit points. By determining the entry and exit points, you can gather important information about the suspect's possible movements and actions within the building. This can help in identifying potential evidence, such as fingerprints and tools used, and in conducting a comprehensive search of the inside and outside of the building.