秦汉时期已经开始发展铁器成型技术，这句翻译为（）

A.Iron casting technology has already been employed in Qin (220 to 205 BC) and Han dynasties (206 –220 BC).

B.Iron casting technology has already been employed in Qin (221 to 207 BC) and Han dynasties (236 –210 BC).

C.Iron casting technology has already been employed in Qin (221 to 207 BC) and Han dynasties (202 –220 BC).

D.Iron casting technology has already been employed in Qin (221 to 207 BC) and Han dynasties (201 –227 BC).

正确答案：Iron casting technology has already been employed in Qin (221 to 207 BC) and Han dynasties (202 –220 BC).