干涉婚姻自由的两种主要形式是（）。

A.包办婚姻和强迫婚姻

B.包办婚姻和买卖婚姻

C.无效婚姻和事实婚姻

D.无效婚姻和可撤销婚姻

The Southern States wanted to ______ the Union, so the American Civil War ______. [ ]

A. get away with; broke down          

B. get away from; broke down

C. break away from; broke out      

D. break away from; was broken out