Which of the following lines would typically be found in CAD drawings?

In Computer-Aided Design (CAD) drawings, various line styles are employed to convey different types of information about the objects being represented. Dashed lines are indeed used to indicate hidden objects or features that are not visible in the current view, helping to communicate the complete design intent. Solid lines are also standard in CAD drawings, typically representing the visible edges and boundaries of objects.

Thus, both of these line types serve critical functions in a CAD drawing by providing clear visual indicators that help readers interpret the design accurately. The inclusion of both dashed lines for hidden features and solid lines for boundaries in CAD drawings confirms that all the listed line types are standard practices in the industry, leading to the conclusion that the most comprehensive choice, which acknowledges the presence of both line styles, is the correct one.