17. during the critical period of a child's life, the first five years, trust and self-confidence are developed when is/are present in the environment. a. ecological systems b. reinforcement rewards c. many caregivers d. consistent and nurturing care

Which of these questions could best you evaluate the advice from this website selling supplements? a)which supplements does the author recommend? b)how much do the supplements cost? c)what are the authors credentials? d)how should i exercise according to this author?