Which of the following statements summariz
题型：单项选择题
问题：
Which of the following statements summarizes the underlying principle for the development of a parenbchild relationship（）
A. The parents to-be had good role models in their childhood.
B. The relationship is part of the adult maturational process.
C. The development is directly related to the physical needs of the neonate.
D. The relationship is based on the need for early and frequent parent-infant contact.