Final answer:
The baseline grid is the best way to prevent a wandering baseline.
Step-by-step explanation:
The correct answer is 2) Applying a baseline grid. A baseline grid is a helpful tool in graphic design that allows you to align and space text and other elements consistently. By using a baseline grid, you can ensure that the text has a consistent baseline and prevent it from wandering or appearing uneven.
Using a ruler and adjusting the leading (line spacing) are not specifically designed to prevent a wandering baseline. However, using a ruler can help in aligning elements accurately, and adjusting the leading can affect the spacing between lines of text, making it appear more organized.
Using a grid system, which divides a design into a series of columns and rows, can help with overall layout and alignment but may not directly address the issue of a wandering baseline.