(Figure: Externality Table A) the Table Shows the Information for a Public

question 37

Multiple Choice

(Figure: Externality Table A) The table shows the information for a public good being provided to two citizens. Based on the table, what is the equilibrium quantity?
$\begin{array}{|r|r|r|r|}\hline \text { Q } & \text { Ann's MPB } & \text { Ben's MPB } & \text { MSC } \\\hline 1 & \$ 10 & \$ 12 & 6 \\\hline 2 & 8 & 9 & 9 \\\hline 3 & 6 & 6 & 12 \\\hline 4 & 4 & 3 & 15 \\\hline 5 & 2 & 0 & 18 \\\hline 6 & 0 & 0 & 21 \\\hline 7 & 0 & 0 & 24\\\hline\end{array}$

• A) 1
• B) 3
• C) 5
• D) 7

---

Definitions:

Placenta

An organ that develops in the uterus during pregnancy, providing oxygen and nutrients to the growing fetus and removing waste products.

Fetal Membranes

The membranes, including the amnion and chorion, surrounding and protecting the embryo or fetus in the womb.

Prenatal Period

The phase of development that occurs from conception until birth, critical for the health and growth of the fetus.

Developmental Psychologists

Professionals specializing in studying how human beings change over the course of their lives, focusing on emotional, mental, and social growth.