Final Answer:
It is because of of the language and emotional tone used by the student in the journal entry. Therefore the correct option is D. it contains biases against the winning candidate.
Step-by-step explanation:
The student's journal entry, expressing anger and criticism toward the election outcome, indicates a strong personal perspective. The language used to convey dissatisfaction with the result suggests a bias against the winning candidate. The historian would note that the student's emotions and opinions influence their interpretation of the election, leading to a clear bias against the victor.
Moreover, the journal serves as a reflection of the writer's subjective viewpoint and emotional response to the election results. The historian, analyzing this entry, would recognize that the personal nature of the journal does not mitigate its bias. Instead, it highlights the writer's subjective stance, which leans unfavorably towards the winning candidate.
The historian's assessment would focus on the evident emotional tone and critical language used in the journal, indicating a clear bias against the victorious candidate. The personal nature of the journal does not absolve it of bias; rather, it amplifies the individual's subjective viewpoint, making it apparent that the entry is inclined against the winning candidate.
Therefore the correct option is D. it contains biases against the winning candidate.