Which of the following diagrams best represents the relationship between Women, Mothers, and Engineers?

Answer: D. One circle entirely inside another, with a third circle intersecting both

All Mothers are Women, so the "Mothers" circle must be entirely inside the "Women" circle.
Some women are engineers, and some mothers are engineers.
Therefore, the "Engineers" circle should intersect both the "Mothers" and "Women" circles.

Answering after opening this box earns no Practice Points.