What did investors to that trigger the stock market crash in 1929

Investors borrowed money "on margin" to buy stocks for investment purposes. When the market went down, they could not repay the margin loans fast enough. This helped cause the great depression, but it wasn't the only thing that caused it.

i cant if you dont give me the sentence or whatever.

man·u·script

/ˈmanyəˌskript/submit

noun

a book, document, or piece of music written by hand rather than typed or printed.

synonyms: document, text, script, paper, typescript

an author's text that has not yet been published.

thats all i can with. sorry. next time post the full question.

increases in demand are shown by a shift to the right in the demand curve. this could be caused by a number of factors, including a rise in income, a rise in the price of a substitute or a fall in the price of a complement.

which the answer is:

b