Detailed Instructions: In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".
See one example below:
Problem: [header] How to create a christmas tree forest [title] Consider the type of tree you want to plant. [step] There are a wide variety of christmas trees and include fir, pine, spruce, cypress, and cedar. These trees thrive in different climates and look different from one another. <sep> (A) It is important to research the tree before setting up your tree to try it out to make sure you can write the tree's growing season so that you can get the most supplies you need. If you're just interested in having a tree stand out, then make sure to check for the following : [substeps] Spruce trees. (B) [substeps] Trees green may be used in a mix of green and evergreen. Greens, such as pintos and olive oil, may be more delicate than these. (C) Where the trees grow together is up to you. [substeps] Spruce trees light up the night for hours in the morning and drown out the morning sunrise between afternoons. (D) Think about where your tree forest will be located and choose a tree that can thrive in that climate. [substeps] Balsam firs are a popular christmas tree species that grow in the northern united states and canada, in hardiness zones 3-5 or states like minnesota, north dakota, and montana.
Solution: D
Explanation: This is a good example. Only option D is about Christmas trees. So, it's the correct option.

Problem: [header] How to calculate consumer surplus [title] Understand the law of demand. [step] Most people have heard the phrase " supply and demand " used in reference to the mysterious forces governing market economies, but many don't understand these concepts' full implications. " demand " refers to the desire for a good or service in the marketplace. <sep> (A) [substeps] For example, " supply and demand products by frugal farmers entrepreneurs should be heavily distributed and integrated in the new market. For established " goods, whether any subsequent products upon that market must be sold within the same year. (B) Therefore, prices will rise and fall because demand for goods is increased rapidly, attracting new markets and becoming increasingly competitive. [substeps] Establish the limit of demand in your industry, marketing and trade. (C) Identify the demographics and markets in which demand will demand the products and services, and estimate your costs when determining the cost of the goods or services such as fuel or water. [substeps] The highest demand is a production interest rate of 7 %. (D) Generally, if all other factors are equal, demand for a product will fall as its price increases. [substeps] For example, let's say that a company is about to release a new model of television.
Solution:
D