The Nurse Is Developing a Pedigree

The nurse is developing a pedigree. Which pieces of information can be used to help identify the widowed female?

A) A square is used to denote the female.
B) A circle is used to denote the male.
C) A horizontal line connects the circle and the square in the middle.
D) A line above the circle and square that is linked on the top of each shape.
E) The square has a diagonal line through the square from bottom left to upper right corner.