Aryanna is a fourth-grade student with a learning disability. Recent assessment data shows that Aryanna is able to find the perimeter of rectangles but struggles to find the area. When asked to calculate area, she typically adds the length and width rather than multiplying. Which of the following interventions would best help Aryanna? A: asking the campus math interventionist to provide pull-out support for Aryanna to ensure that she does not fall behind B: providing Aryanna with a formula sheet to use on assignments and tests C: teaching Aryanna a mnemonic device to remember the formula for the area of a rectangle D: providing small-group instruction in which square tiles are used to cover the surface of a rectangle