Fourteen-year-old lisa was asked, "what would happen if everyone in the world suddenly went blind? " she responded, "those who had previously been blind would become leaders." lisa's answer indicates she is in the stage of development.

a. preconventional
b. postconventional
c. formal operational
d. preoperational

formal operational stage of development.

Explanation:

Formal operational stage of development -

It is the stage of adulthood , starts from the age of twelve till the age of adulthood .

In this stage of child development , the child tends to attain new and fresh ideas and use his or her mind in order to manipulate many activities and tasks. The child starts to think in a creative manner and starts to learn many new things.

Hence, from the given scenario of the question, Lisa is in the formal operational stage of development.

she recieved a treatment not thought to be specifically effective in treating her disorder.