Ten years ago the population of our village was _____that of theirs. [ ]

A. as twice large as

B. twice as large as

C. twice as much as

D. as twice much as

双避冲突，又称负负冲突，是指当个体同时面对两件都具有威胁性、不利的事情时，两件都想躲避，但受条件限制，只能避开一件，接受另一件，在做抉择时内心产生矛盾和痛苦。
根据以上定义，下列属于双避冲突的是______。

A．鱼与熊掌不可兼得
B．前有标兵，后有追兵
C．想拔掉疼痛的牙齿，又害怕拔掉牙的疼痛
D．学生想参加校足球队为学校争光，又怕耽误时间影响自己的学业成绩