Line graph/chart - straight or smooth curves? - User Experience

I'm working on dashboard and researching different kind of graphs that could be used. I couldn't find any information about usability/UX differences between line charts that are using straight (A)

Smooth Line Chart - Venngage

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Line graph/chart - straight or smooth curves? - User Experience Stack Exchange

Line chart options, Looker

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How to make a line graph in Excel

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