What might have led to the tragic end of the Titanic and the Britannic?是什么导致了泰坦尼克号和不列颠尼克号的悲惨结局？

A、 Their unscientific designs.
B、 Their captains'misjudgment.
C、 The assumption that they were built with the latest technology
D、 The belief that they could never sink with a double-layer body