Justin's mother believes that justin, a nine-month-old, is still in piaget's sensorimotor stage of cognitive development. to test this belief, which of the following could she try? select one:
a. see whether he knows how to turn on the tv by using the remote controlb. hide his favorite toy underneath a couch cushion and see whether he looks for itc. place a brightly colored mobile above his crib and see whether he reaches for itd. ignore him when he cries and see how long he continues to cry

To hide the favourite toy of Justin underneath a couch cushion and then to see whether he tries to find it and look for that toy.

Option B

Explanation:

Piaget was one of the most famous psychologists. He had developed many theories. One of those was about the cognitive development. In the sensorimotor stage of this cognitive development, the child is in the first stage of development and it begins when the child is born and this stage lasts till the age of two. In this stage, the child learns about the world by using their senses and learns to interact with the surroundings with the senses.

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.