Does Starbucks use 100 Arabica coffee?

Excuse me, could you please clarify for me if Starbucks exclusively utilizes 100% Arabica coffee beans in all of their coffee blends? I've heard that Arabica beans are known for their superior flavor and quality, and I'm curious if Starbucks adheres to this standard across their product offerings. Additionally, if they do not use 100% Arabica, could you elaborate on what other types of beans they might incorporate into their blends and the reasoning behind such decisions? I'm genuinely interested in understanding the sourcing and quality control processes employed by Starbucks.