At which of Piaget's cognitive stages does a child express that they do NOT understand that the volume of liquids remains the same even though their containers
change?
A. Sensorimotor
B. Pre-operational
C. Concrete operational
Formal operational

Well, l think that some effective communication is, emotional barriers and lack of attention, interest distraction or irrelevance. also some physical disabilities such as hearing problems or speech difficulties.      l hope i am correct  and you good luck.

By placing 2 fingers at the sternum (the spot where the lower ribs meet) the put the heel of your other hand next to your fingers. hope this

Yes, this is very true. specifically causing damage in the  dentrite. 

The answer is true,hope my answer was to you : )