Q4 Single choice Mark for later Which best describes what the map method accepts and emits? A It accepts a single key-value pair as input and emits a single key and list of corresponding values as output. B It accepts a single key-value pairs as input and can emit only one key-value pair as output. C It accepts a list key-value pairs as input and can emit only one key-value pair as output. D It accepts a single key-value pairs as input and can emit any number of key-value pair as output, including zero. Correct answer