C

A 3-year-old typically can climb stairs placing both feet on each step, ride a tricycle, speak in 3-word sentences, and state name and gender, but coherent story-telling usually appears closer to 4 years. These abilities match the child in the vignette, indicating a developmental age of about 3 years [Bandzar 2015 PMID 26371194; Kit 2017 PMID 28197817].