Final answer:
Option B is correct for a child at the maintenance stage of learning the alphabet, because they can identify all letters and their sounds.
Step-by-step explanation:
A child who is at the maintenance stage of learning the alphabet can identify all letters of the alphabet and their corresponding sounds. This indicates that the child has moved beyond the initial stages of learning and recognizing letters and sounds, and is now able to consistently recall and identify each letter and sound accurately. This stage comes after the child has been exposed to practice with vowel and consonant letters and sounds, as well as understanding the differences between vowels and consonants, including vowels that can be consonants (like 'y'). As a result, the correct option that describes a child at the maintenance stage of learning the alphabet is B) The child can identify all letters of the alphabet and their corresponding sounds.