A general principal: integrity.
In this activity, psychologists are honest, fair, and respectful of others. In describing or reporting their qualifications, services, products, fees, research, or teaching, they don’t make false statements. Psychologists strive to be aware of their own belief systems and the effect of these on their work.
I looked it up and i found that C and D are the answers
Growth is physical like weight and length. development is more how the child interacts. Are they speaking and crawling/walking at appropriate times.