A data analyst was asked to create a visual representation of sales for the first quarter of 2020. Which of the following visualizations should be used when a time element is present?

A bubble chart is primarily used to display the relationship between three numerical variables, where the size of the bubble represents the third variable, and is not optimized for showing a single variable's trend over time.

A line chart is the most appropriate visualization for displaying trends over a continuous period, such as sales figures across a financial quarter. It clearly shows how the sales values change or progress over time, making patterns and fluctuations easily discernible.

A scatter plot is generally used to show the relationship or correlation between two numerical variables, not for tracking a single variable's progression across a time axis.

An infographic is a broad category for a visual representation of information, but it is not a specific chart type best suited for time-series data in the way a line chart is.