Which of the following sentences would be the first sentence that would occur in a logical order?

a-Over 20 million people died as a result of World War I.

b-However, the whole fabric of society changed as nations realized the global implications of their self-serving treaties.

c-The assassination of Archduke Ferdinand was not sufficient cause to slaughter the millions of soldiers and civilians throughout all of Europe and her colonies.

d-World War I was a destructive and unnecessary war.Which of the following sentences would be the first sentence that would occur in a logical order?d
Which of the following sentences would be the first sentence that would occur in a logical order?
d, c, a, b. in that order.