This line is used in Autocad to: Select one: a. Display precise information about the size of the object b. Represent visible features for an object. They are the darkest and most present C. Represent symmetry and mark the center of circles, the axes of cylinders, and the axes of symmetrical parts, such as bolts b. Represent visible features for an object. They are the darkest and most present c. Represent symmetry and mark the center of circles, the axes of cylinders, and the axes of symmetrical parts, such as bolts O d. Represent features that cannot be seen in the current view. They are as dark as the object lines