Teacher: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".
Teacher: Now, understand the problem? Solve this instance: [header] How to make homemade blueberry poptarts [title] Combine 2 1/2 cups flour , 3 tablespoons sugar and 1 teaspoon salt in a large bowl. [title] Slowly shred 1 cup cold butter using crosswise motion on a grater. [title] Place shredded butter into the bowl together with the dry ingredients. <sep> (A) [title] Fill in 2 cup prepared brownies using either a grater with a brush. [title] Tilt the bowl in a single direction to try to mash the brownie. (B) [step] Mix until thoroughly combined using your fingers. [title] In a small bowl, beat the egg yolk with water, reserving the egg white until later. (C) [title] Quickly toss flour, chopped blueberries, and 2 ripe bananas into the butter mixture. [title] Allow these ingredients to become slightly sticky. (D) [title] Lightly grease the pan using a stick grater. [title] Place 1 small onion (peeled, chopped, diced) in the pan.
Student:
B