Which visualization best serves the purpose of highlighting key sales growth factors?

The option highlighting the use of a time series chart, variance calculation, and smart insights is particularly effective for focusing on key sales growth factors.

A time series chart is invaluable for displaying sales data over a period, allowing analysts to visualize trends, identify patterns, and understand how sales fluctuated over time. This visualization reveals growth trends clearly, making it easier for stakeholders to grasp how sales performance has evolved.

Variance calculations add another layer of depth by enabling analysts to compare actual sales against forecasts or previous periods. This comparison helps identify not just whether sales are growing, but also by how much they differ from expected performance, highlighting areas of significant change—whether positive or negative.

Smart insights serve to automatically analyze data trends and patterns, providing contextual information without the need for complex manual analysis. This feature helps users quickly grasp the key factors driving sales growth, with insights often generated based on the data's underlying patterns.

In combination, these tools allow for a comprehensive view of sales performance, focusing on growth factors most effectively. Each component supports the identification and understanding of the elements contributing to changes in sales, making this option the best choice for the stated purpose.