What was the main method that businesses used to inform consumers about new inventions they could purchase during the industrial age?
a. the multiplex
b. the telephone
c. the telegraph
d. advertisements

The main method that businesses used to inform consumers about new inventions they could purchase during the Industrial Age were advertisements. Correct D

the local newspapers were becoming recognized as a medium for delivering advertising to the masses.Ben Franklin was the first who created the structure and format of print ads.

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."

it creates acid rain