Final answer:
The word 'vicissitudes' in the provided context suggests changes or fluctuations over time, and the type of context clue used to determine its meaning is an Inference context clue.
Step-by-step explanation:
The student is asking for help in determining the meaning of the underlined word "vicissitudes" by looking at the context in which it is used. The sentence 'Such are the vicissitudes of history. Nothing remains the same.' implies that history undergoes various changes and that these changes are expected and normal. This context helps us infer that vicissitudes refer to the changes or fluctuations that happen over time. Based on the context provided, the answer to the question is Inference context clue (D), as the meaning of "vicissitudes" is not directly defined, nor is a synonym or contrast provided. Instead, we use the surrounding sentences to infer the meaning of the word.