— Why hasn't Jane spoken to me for days? 

— It was ____ you spoke about her behind her back. [    ]

A. as

B. since

C. for

D. because

张某乘坐我国船舶，经过新加坡时与领座一乘客发生口角，争执中张某掏出一三角刮刀，猛地向该乘客刺去，遂将邻座刺死，张某的行为()。

A.适用新加坡刑法

B.适用中国刑法

C.可适用中国刑法，也可适用新加坡刑法

D.适用第三国刑法