D)the mongols established a central code of laws and policies
Answer:
Piaget's theory
Explanation:
Jean Piaget has developed the theory of cognitive development in which he has mentioned four different stages including the sensorimotor stage, preoperational stage, formal operational stage, and concrete operational stage.
Jean Piaget's theory is based on the ideology that a child can actively construct different knowledge as he or she manipulates and explores the world around him or her. His theory explains a framework for the understanding of the development of thinking and cognition process. He explained the process through which a child interacts with his or her environment by using senses.
Answer:
Dr. Ingram conducted an C. experimental study.
Explanation:
An experimental study is that in which the variables are in direct control of the researcher. He/she is in control of <em>changing or adjusting</em> them in order to reach an outcome.
Dr. Ingram <em>varied the imageability of items </em>on a list to measure the participants' recalling abilities. He is conducting an experimental study.
Let's see why the other options are not valid in this case:
- A correlational study tries to find correlations between 2 or more variables.
- In a naturalistic study the researcher observes a certain phenomenon.
- An observational study just centers on observing, there is no manipulation of variables.
Answer: The allies helped Americans by providing supplies, weapons, military leaders, and soldiers.
Explanation:
