A secondary source is one that describes, analyzes, or interprets primary sources or events rather than presenting firsthand accounts.
From the options provided, the examples of secondary sources are:
C: a biography of a famous person - This interprets and analyzes the life of that person based on primary sources. D: a historical fiction novel on WWII - This is also considered a secondary source as it is a creative interpretation of historical events.
While options A (an autobiography) and B (an original and handwritten map) are primary sources because they provide firsthand accounts or original documents related to the subject.
Thus, the best examples of secondary sources from your choices are C and D.