[求助]新题13套No.1争议语法题

GWD1-Q20:
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Rivaling the pyramids of Egypt or even the ancient cities of the Maya as an achievement, the army of terra-cotta warriors created to protect Qin Shi Huang, China’s first emperor, in his afterlife is more than 2,000 years old and took 700,000 artisans more than 36 years to complete them.

1. took 700,000 artisans more than 36 years to complete them[C1] 

2. took 700,000 artisans more than 36 years to complete it[C2] 

3. took 700,000 artisans more than 36 years to complete[C3] 

4. 700,000 artisans took more than 36 years to complete[C4] 

5. to complete them too 700,000 artisans more than 36 years[C5] 

既已知完成的东西是谁何须补出it咧…..

反而有点画蛇添足的感觉…