Jenna's Mom Tells You That She Wants You to Make

Jenna's mom tells you that she wants you to make 18-month-old Jenna pump her legs on the playground at day care because she doesn't want her to get used to an adult pushing her. What might you tell this mother about gross motor abilities at Jenna's age?

A) Jenna is capable of pumping her legs but might need help getting on and off the swing according to developmental milestones.
B) Jenna's whining should be ignored as she should be able to pump her legs without adult intervention.
C) Eighteen- to 24-month-olds are often awkward in their gross motor abilities, running awkwardly and climbing stairs with both feet, so she is most likely unable to pump her legs effectively at this age.
D) 18-month-olds vary in development and if the mother feels she is capable then she should be put on the swing and not pushed but told to use her legs to pump.