Final answer:
Students are expected to begin incorporating dialogue into their narrative writing by the 3rd grade. This helps them enhance their writing by showing character interactions and moving the plot forward. The correct option is B.
Step-by-step explanation:
In narrative writing, students are typically encouraged to begin incorporating dialogue by the 3rd grade. This is because around 3rd to 6th grade, students are developing their skill levels in reading, writing, and math, preparing them for more complex writing tasks.
By using dialogue in their narratives, they learn to convey character conversations and interactions, which helps to move the plot forward and reflect the personalities of their characters. As students advance, they continue to refine their writing abilities through peer reviews and editing for sentence structure and other narrative elements, such as transitions, structure, and conclusion.