Carl is studying food science at college and hopes to open up meat processing factory of

Carl is studying food science at college and hopes to open up meat processing factory of his own one day.
A. /; a
B. /; the
C. the; a
D. the; the

(答案→)A. /; aB. /; theC. the; aD. the; the解析：考查冠词，the是定冠词；a/an不定冠词，学科前面不加冠冠词，在大学里学习食品科学，所以不加冠词；开发一个肉加工厂，所以加不定冠词，因为单词meat以辅音字母m开头，所以是不定冠词a，固定词组open up意思“开发”

就是这个解释