Step 1: Understanding the question.
The sentence talks about how biography, when based on subjective sources, lacks a solid foundation in historical fact. We need to choose the option that best completes the sentence in this context.
Step 2: Analyzing the options.
(A) History is superior to Biography: This is not the correct answer, as the passage doesn't compare history with biography but focuses on the foundation of biography itself.
(B) Biographies should be based on historical facts: This is the most appropriate option, as it logically follows from the idea that biographies based on subjective forms lack solid foundations.
(C) Biographies are fictional: This is not correct because the passage doesn’t imply that biographies are fictional, but rather that they should be based on facts.
(D) Biographies are subjective: While this might be true, the passage is suggesting that biographies should be grounded in historical facts, not merely subjective viewpoints.
Step 3: Conclusion.
The correct answer is (B) Biographies should be based on historical facts, as it aligns with the idea that biography needs a solid factual foundation.