After Teaching a Very Long Block of Instruction Before Lunch

After teaching a very long block of instruction before lunch, the instructor wants to check how well the learners have learned the material. Which of the following methods is the BEST to accomplish this goal?

A) Have the learners answer review questions about the block of instruction
B) Have each learner recite what was said during the block of instruction
C) Give the learners home work that night and go over it the next day
D) Put the learners in groups to discuss the instruction that was taught.