中国大学MOOC: What values are deeply rooted in the conceptualization of the Mean?

One of the types of cost estimation is Order of Magnitude. This estimate ______. A: is performed when detailed information is available B: is performed when little if any information is available C: is used in the beginning of the project conceptualization D: B and C

What is the focus of this special issue of the journal? A: How immunity develops in the infants. B: How infants maintain an optimal nutrition. C: How the conceptualization of immunonutrition evolved. D: How nutrition is related to immunity, especially in infants.