参考答案：C

解析：

In a 1960s study, children were (60) drawings of children with disabilities and without them,根据文中的意思，有人给孩子们展示了图画，只有shown是展示的意思，show sb sth，这里显然用的是被动语态；bought是buy是过去式，购买的意思，capture是捕捉，made是制造。