Which of the following scales of measurement ordinarily does not lend itself to a measure

What is the correct sequencing of Piaget's stages of cognitive development?

a. Concrete operational, sensorimotor, preoperational, formal operational b. Preoperational, concrete operational, formal operational, sensorimotor c. Sensorimotor, preoperational, formal operational, concrete operational d. Sensorimotor, concrete operational, preoperational, formal operational e. Sensorimotor, preoperational, concrete operational, formal operational

After age _________ , women are usually advised to have their fetuses checked for Down's syndrome and other chromosomal abnormalities

A) 18 B) 35 C) 25 D) 20