Use your completed Reading Guide for this lesson to answer the following question. In #4, one of the effects of the stock market crash was that factories
O were bombed
O opened
O were built
Shung
closed

im going to go with b.

i think i will need more detail to answer if this is a specific question on a test, but technology advancements are good for many industries, such as medicine or food industries, new technology could us in medicine in ways such as new scanners to tell us more about our bodies or new cures or vaccines for diseases.