The correct answer is A) Yes, they both have stage theories.
Piaget and Erikson have similarities between their theories of development because they both have stage theories.
When we use the term stage theory we refer to a hypothetical construction to consider steps or show different phases that happen during a period of time. It describes what happens in different moments as it was a "ladder:" stage or step 1, stage or step 2, and so on. Both Jean Piaget and Erik Erikson have stage theories. Erickson developed the Child Psychology Theory and Piaget worked on the stages of cognitive development.