Besides Thinking and Writing, Most of My Effort Has Involved

Multiple Choice

Besides thinking and writing, most of my effort has involved reading materials new to me. As a consequence, the citations I provide are primarily to sources I have read recently. (Kent Greenawalt, <>Law and Objectivity)
This statement exemplifies a(n) _____.

A) explanation
B) unsupported assertion
C) argument
D) conditional statement
E) illustration