With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: All the obsolete 8-bit encodings are rarely used in the communication protocols and text-exchange data formats, having been mostly replaced with UTF-8. A number of encoding conversion applications were developed. "iconv" is an example that is supported by most versions of Linux, Macintosh and some other operating systems; but converters are rarely needed unless accessing texts created more than a few years ago.
text_B: If I want to minimize problems in my text-exchange data, would I use UTF-8 encoding?
YES.