英语词汇题,1.We’d have made a decision by now if Jean hadn’t been

这个是牛津辞典的例句,D。obstructiveWe'd have made a decision by now if Jean hadn't been so obstructive。A。obstinate:AdjectiveStubbornly refusing to change one's opinion or action,despite attempts to persuade one to do so。B。obedient AdjectiveComplying with orders or requests; submissive to another's will C。obstacle NounA thing that blocks one's way or prevents or hinders progressD。obstructiveAdjectiveCausing a blockage or obstruction。