Which choice best describes how the introduction of the assembly line led to prosperity in specialized industries? A. The assembly line was an innovative invention
B. National markets were created by assembly line advances.
C. Mass production decreased when factories hired more line workers
D. Mass production led to lower production costs?
SOMEONE PLEASE HELP ME

D. Mass production led to lower cost

Explanation:

The machine helped decrease cost to produce cars and made it easier to buy one

the end of the gilded age coincided with the panic of 1893, a deep depression, which lasted until 1897 and marked a major political realignment in the election of 1896. this productive but divisive era was followed by the progressive era.

the birthmark on georgiana's face alludes to the doctrine of "original sin," being tainted with evil from birth