As the designer of a distinctively shaped automobile body style, you may protect your intellectual property with a:

A. trademark 
B. patent 
C. copyright 
D. industrial design right

Let's first understand the different between the types of intellectual property (IP) described in our answer choices and the differences between them:

A. Trademark - A trademark is defined as any sign, design, or expression that is used to identify products of a particular source from another.

B. Patent - A patent protects an invention (such as a machine, manufactured article, industrial process, or chemical composition) for a limited durability in exchange for public disclosure of the invention.

C. Copyright - A copyright protects original works of authorship including computer software, architecture, books, songs, etc.

D. Industrial Design Right - Industrial design right protects against the aesthetic aspect of an article, rather than the technical or functional features of a product.

In the question, the designer has created a distinctly shaped automobile body style. Since the designer is only interested in protecting the aesthetic qualities of the design rater than the functional ones, an industrial design right is the proper intellectual property to protect it. Therefore, our answer choice is D.