Answer:
synonym of many is numerous
Explanation:
The correct answer would be option b. of a lifetime of strengthening of the bigram detectors for common english letter pairs.
When learning native or a second language, the rules of structures of words are formed like chunks or bigram detectors that indicate some common English letter pairs patterns. When it is stated that Betty misread the string of letters in a way that follows the rules of common English, it is because of the chunks already formed in her brain that tries to fit the letters together in a structure that would make some sense.
