At a social event, you chat with someone you meet about your family, telling them that your brother is older than you and your sister is older than your brother. they then ask you who is the youngest in the family. jean piaget would say that this person has not reached the:
a. sensorimotor stage
b. concrete operational stage
c. preoperational stage
d. formal operational stage

The correct answer is D. Formal operational stage.

Explanation:

According to Piaget, one has reached this final stage when he/she is able to think in an abstract way. This means that one can think about things that are not physically there, so the person has to imagine them.

In this case, the person asking about the family would have to see the siblings physically in order to know who is the youngest. Someone who has reached the formal operational stage would be able to deduce who is the youngest by picturing them in his/her mind.

i think the answer is true : ))

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.