Final answer:
In the paragraph, MLK does not express disappointment with the white moderates' support for segregation option (B).
Step-by-step explanation:
In the paragraph that begins, "I must make two honest confessions...," the disappointment that MLK does not have with the white moderates is their support for segregation option (B). The other three options mentioned in the question - their preference for "order" over justice, their belief that they can set the timetable for Black people's freedom, and their willingness to wait for a "more convenient season" to address racial injustice - are all disappointments that MLK expresses towards the white moderates in the paragraph.