Final answer:
The correct answer is 'True'; Geoffrey Chaucer did not complete 'The Canterbury Tales' before his death, leaving several tales unfinished or missing.
Step-by-step explanation:
Geoffrey Chaucer did not fully complete The Canterbury Tales before his death. The correct answer to the question is: a. True. Chaucer began writing this collection of stories told by a group of pilgrims on their way to Canterbury Cathedral in the 14th century. However, the exact number of tales he intended to include in the completed work is unknown, and he died in 1400 leaving the collection unfinished with several tales only partially completed or entirely missing.