The two pieces of evidence that would be most relevant to the claim about TikTok's desire to appeal to a broader range of users and compete with YouTube more effectively are:
A. statistics showing the average age of TikTok users has increased since the start of 2022
C. statistics showing the average length of TikTok videos has increased since the start of 2022
These pieces of evidence directly support the idea that TikTok is evolving to attract a wider audience and align itself more closely with platforms like YouTube, which typically features longer content.