【正确答案】 C

【答案解析】[解析] 吉恩决定不去开会了。句中make up one's mind to do sth：下定决心做某事。promise to do sth：答应做某事，如：He has promised to behave better henceforth．他答应从今以后要表现得好些。try to do sth：努力做某事，如：He tried to climb the tree, but he could not．他试图爬树，可爬不上去。decide to do sth：决定做某事，如：The boy decided not to become a sailor．那孩子决定将来不当水手。attempt to do sth：企图做某事，如：I attempted to read the entire novel in one sitting．我试图一次读完整本小说。只有decide意思上和make up one's mind最接近。