Research indicates that some ____% of couples suffer from infertility

An older relative is showing signs of dementia. He forgets things and he is disoriented, especially when he is riding in a car. How would you determine whether he is suffering from Alzheimer disease rather than some other problem?

What will be an ideal response?

A 6-month-old baby drops a toy off the side of her high chair. According to Piaget:

a. she will know the object is now on the floor b. she will immediately forget the object c. she will cry until you pick it up for her d she will look for it briefly and then move on to something else