John Is a 4-Year-Old Child with Global Developmental Delay

John is a 4-year-old child with global developmental delay. His gross motor skills are approximately at the 8-month-old level, and he does not have expressive communication. He attends a special preschool program. John has three older siblings. His parents both work. The mother has primary responsibility for his caregiving and expresses concerns about stress and fatigue. The family is anxious for John to learn to walk. At this point in the child's intervention program, who is the most important team member?

A) Speech therapist
B) Physical therapist
C) Occupational therapist
D) Family