Haruko Finds Her Mother's Keys and Begins to Play with Them.She

Haruko finds her mother's keys and begins to play with them.She works patiently in an attempt to fit the keys into an opening in the VCR.She tries the keys one at a time;she tries to put the key ring into the slot;she tries to separate the keys into two groups.Finally,she succeeds in jamming the keys into the equipment.Haruko's age is most likely

A) 8 months.
B) 3 years
C) 5 years.
D) 15 months.