如果将各环节的损失降至合理范围，每年至少可节约粮食2000万吨。（　　） 
　　 A. It would be possible to save at least 20 million tons of grain every year if such losses would be reduced to within the rational limits. 
　　 B. It will be possible to save at least 20 million tons of grain every year if such losses are reduced to within the rational limits. 
　　 C. To save at least 20 million tons of grain every year will be possible if such losses would be reduced to within the rational limits. 
　　 D. If such losses are reduced to within the rational limits， to save at least 20 million tons of grain every year would be possible.