What Was the Practical Question That Eventually Led to the Development

Multiple Choice

What was the practical question that eventually led to the development of the first workable intelligence test?

A) "What needs to be done to ensure a strong military-industrial complex?"
B) "What needs to be done to produce mathematically gifted students?"
C) "How can individuals be helped in their striving for self-actualization?"
D) "How can developmentally disabled children be taught more effectively?"