What is the most likely reason the monks tale is full of parables

Parables were commonplace in Chaucer's time, and audiences would have found them familiar.

Explanation:

Parable is a short narrative that uses allegories to convey a moral lesson.

Parables were very common in Chaucer's time and consisted of stories intended to bring some teaching to life. They have symbolism, where each element of the story has a specific meaning.  These stories had many common elements of the culture of that time and this made people familiar with the narrative told.

answer: group ii. when the root is a full word except for a final e, the forms usually are spelled with -able.

explanation: the word will be deplorable. -able will be used with the word 'deplore-'. the group ii is when the root is a full word except for a final e, the forms usually are spelled with -able is used for the word deplore- because the word deplore- has 'e' at the end of it.