What would improve image clarity after experiencing elongated images?

Increasing vertical angulation is the correct approach to improve image clarity when elongated images are encountered. Elongation typically occurs in dental radiography when the vertical angle of the X-ray beam is too shallow or insufficiently directed towards the area of interest. When the beam is not perpendicular to the film or the object being radiographed, it can distort the image, leading to elongation of the structures.

By increasing the vertical angulation, the X-ray beam can be directed more appropriately, helping to ensure that the images captured represent the actual anatomical structures more accurately and without distortion. Proper angulation optimizes the relationship between the X-ray tube, the object, and the film, leading to improved image clarity and reducing distortion.

The other options would not effectively address elongation. Decreasing vertical angulation would likely exacerbate the problem, while increasing developing time or altering fixer temperature would not correct the underlying issue of improper angle during exposure. These adjustments pertain to processing rather than the initial imaging technique.