Donovan Wants to Determine Whether the Timing of Standing Is

Multiple Choice

Donovan wants to determine whether the timing of standing is affected by malnutrition.He plans to check the age at which malnourished and adequately nourished toddlers first pull themselves to standing.What would be the most appropriate research method for Donovan's study?

A) structured observational
B) natural (or quasi-) experimental
C) ethnographical
D) laboratory experimental