Detailed Instructions: In this task, you will be presented with a question having multiple possible answers in Chinese language. And you should choose a most suitable option out of "A", "B", "C", "D", and "E" based on your commonsense knowledge.
Q: Question: 如果一个东西的重量不轻，那它是什么？ 
 Options: A 沉重 B 黑暗 C 笨重 D 关键 E 黑暗 
A:
A