The "domesday book" was used by william the conqueror to
a organize the first english parliament
b make a claim to the french throne
c raise an army for his invasion of england
d create a system of taxation for england

The correct answer that would complete the given sentence above would be option D. The "Doomsday Book" was used by William the Conqueror to create a system of taxation for England. The "Doomsday Book" is considered as the treasure of Medieval England and was used by William the Conqueror to dominate Medieval England. This book contains information about who owned what throughout the country.

The answer should be d.