A quadrilateral in the coordinate plane is transformed. Which of the following transformations would result in a similar figure?

This transformation represents a scaling in the x-direction by a factor of 2, which alters the proportions of the quadrilateral. Additionally, the vertical shift of 3 units does not preserve the angles of the original figure, thus resulting in a non-similar figure.

This transformation involves a translation of the quadrilateral without any scaling. A translation merely shifts the position of the figure in the coordinate plane but does not maintain the proportional dimensions or angles, resulting in a figure that is congruent but not similar to the original.

This transformation reflects the quadrilateral across the y-axis and then translates it downwards by 3 units. While the reflection could maintain angles, the combination with the translation alters the proportions, rendering the new figure non-similar to the original.