Which of the following is(are) true concerning the 2004 tsunami in indonesia?
a.
it had minimal human casualties.
b.
the tsunami waves were as high as 500 feet.
c.
it was triggered by magnitude 9.1 earthquake.
d.
all of the above

Option C i.e It was triggered by magnitude 9.1 earthquake is the correct answer.

The 2004 Tsunami in Indonesia was caused by an earthquake in Indian Ocean whose magnitude was 9.1. The Tsunami waves were as high as 100 feet. It was one of the deadliest disasters of the world which killed more than two lakh people (estimated 227,898 people). It lead to the destruction of billions of property as well.

the scientific method.

sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.