Mr French Is Planning an Upcoming Unit on Adjectives and Adverbs

Mr. French is planning an upcoming unit on adjectives and adverbs. He begins by determining what he ultimately wants students to know and be able to do at the end of the unit. He then creates an assignment that will effectively measure such knowledge and skills. Finally,he designs a series of lessons that will help students perform well on the assignment. Mr. French's approach can best be described as:

A) A taxonomy design.
B) A backward design.
C) An authentic activity design.
D) A learner-directed instruction design.