CSC V1 CH10 关于long-term option contract的特点

请问，这道题为什么选D呢，ABC为什么和 long-term option contract不像呢？
4. Which of the following is a most similar to a long-term option contract
that has same return and risk as a regular option? (Chapter.10)
A. Extendible option
B. European-style option
C. Covered Call
D. Long-term Equity Anticipation Security