William Blackstone was important because he a. wrote the Magna Carta. b. led the Glorious Revolution. c. wrote the English Bill of Rights. d. created a record of common law.

Step 1: Define the Problem

Identify which contribution William Blackstone is known for among the given options.

Step 2: Break Down the Problem

Examine each option to determine which one accurately describes William Blackstone's contribution.

Step 3: Apply Relevant Concepts

• Option a: The Magna Carta was written in 1215, long before Blackstone's time.
• Option b: The Glorious Revolution occurred in 1688, and Blackstone was not a leader in this event.
• Option c: The English Bill of Rights was enacted in 1689, and Blackstone did not write it.
• Option d: Blackstone is known for his work on common law.

Step 4: Analysis, Verify and Summarize

William Blackstone is best known for his work "Commentaries on the Laws of England," which systematically recorded and explained English common law.

Final Answer

d. created a record of common law.