Final answer:
Translations and reflections were applied to obtain A'B'C'D from ABCD.
Step-by-step explanation:
The correct answer is C) Translation and reflection.
To obtain A'B'C'D from ABCD, a translation and a reflection were applied. A translation involves moving an object in a straight line without changing its shape, while a reflection involves flipping the object across a line called the line of reflection. These transformations change the position and orientation of the object, but not its size or shape.