One of the Reasons the 2004 Tsunami in the Indian

One of the reasons the 2004 tsunami in the Indian Ocean caused so much devastation and death is

A) the lack of attention to dire predictions from emergency warning centers
B) the fact that early detection systems indicated the tsunami was not very powerful
C) the lack of buoys or gauges in place to signal the danger to human settlements
D) more than one of these answers is correct
E) this is the first tsunami in recent history, so they have not been considered a danger until this event