Outlines should be written
a. in complete sentences
c. with incomplete thoughts
b. in complete thoughts, but not complete sentences
d. in complete sentences, but not complete thoughts

Outline is a way for organization of ideas and information. It can be used while preparing for speech, writing an essay, a novel, or a study guide. The outline provides a map and guidelines for the future writing.

Outlines should be written  in complete thoughts, but not complete sentences

Correct B

Outlines should be written - In complete thoughts, but not complete sentences.            

Outlines are defined as a normal or general description or plan essaying only the important features of something but not in detail. This can be written in complete thoughts that cover the major description, but it should be compact, hence, its not written in complete sentences.