We Learned That One Simple, Graphical Way of Discovering All

We learned that one simple, graphical way of discovering all of the potential combinations of a particular gene that can occur in children, given the genotypes of their parents, is to:

A) draw a Punnett Square.
B) develop a pie chart.
C) track cause and correlation.
D) draw a Mendelian Circle.
E) create a flow chart using Boasian reasoning.