The system that uses over 140,000 different characters to represent text data is B. Unicode.
Unicode is a computing industry standard for the consistent encoding, representation, and handling of text expressed in most of the world's writing systems. It allows computers to represent and manipulate text in any language, including symbols, punctuation marks, and other characters beyond the ASCII standard (which only represents 128 characters). Unicode currently supports over 140,000 characters from a wide range of writing systems.