Read the following information about the great depression.

the start of the great depression is usually pegged to the stock market crash of “black tuesday” on october 29, 1929, when the dow jones industrial average fell almost 23 percent and the market lost between $8 billion and $9 billion in value.

which is a likely reason this information is from a secondary source?

a. it is an account given by a stock holder who suffered heavy losses during the great depression.
b. it is an extract from the u. s. government’s financial report on the great depression.
c. it is an extract from a magazine article about the great depression.
d. it is an excerpt from a book written during the great depression.