一个高中英语单选题----高手帮忙
_____toimprovingthequalityofriceandwheat,thenewtechnologydevelopedbyscientistsispopularwithfarmers.
A:ApplyingB:HavingappliedC:ToapplyD:Applied
1、选出答案并解释原因
2、标准翻译本句,