Georgie is taking a chemistry class, where different liquids must be combined in specific amounts in order to produce an end product. rather than just pouring them all together, georgie understands that he must combine specific amounts of each ingredient so that he creates the right mixture. clearly georgie has reached the stage of cognitive development.

  d.       formal operational

Choices given in the question are:

a.      Latency

b.       trust vs. mistrust

c.        concrete operational

d.       formal operational

Georgie exhibits the major characteristics of a formal operational stage of cognitive development as per Piaget. This stage is characterized by the individual able to think abstractly and understand the form or structures of a problem. Georgie understands that in the experiment,  he must combine specific amounts of each ingredient and not just pour in them to create the right mixture

answer; coefficient of correlation;