Among His Motivations for the Development of the Wechsler Scales

Among his motivations for the development of the Wechsler scales of intelligence, was David Wechsler's belief that

A) one underlying mental ability was solely responsible for the concept of intelligence.
B) a single intelligence score was the most appropriate measure of human intelligence.
C) human intelligence was significantly influenced by nonintellectual factors.
D) e xisting intelligence scales were adequate to measure the intelligence of all age groups.