Varendock's Important Research Approach to the Study of Children's Memory/suggestibility

Varendock's important research approach to the study of children's memory/suggestibility consisted of

A) presenting lists of ordered words/numbers and asking child to repeat them from memory, meanwhile the presenter uses various facial expressions/suggestibility during this process.
B) used staged/live events to measure suggestibility and memory
C) showing the children pictures or objects and using questions with increasing degrees of suggestion about the object