He had traveled thousands of miles in the hope of earning some money,but 18-year-old Lin Kongming never knew danger was

He had traveled thousands of miles in the hope of earning some money,but 18-year-old Lin Kongming never knew danger was waiting for him.
He and six other migrant workers from Fujian Province spent 36 hours in Iraq as international hostages.But luckily,they were set free last Tuesday morning,unharmed by the people who had taken them hostage.
After hard work by Chinese diplomats in the region the Iraq kidnappers agreed to hand them over to a local religious group.The friendly relations between the Chinese and Iraqi people have played a key role in the release of the hostages,said Foreign Ministry spokesman Kong Quan refused to join the US -led coalition in the Iraq war.
Since April4,over 60 hostage from 12 countries,including America…………………………
1.The seven workers from Fujian were set free mainly because___
A.they were too poor to pay anything
B.kidnappers didn't know they were Chinese
C.Chinese diplomats made great efforts to rescue them
D.kidnappers were friendly to the Chinese
选C翻译一下