Use the information given to answer questions 38 and 39.
This is an excerpt from a book written about Henry Ford by Ray Batchelor.
Each worker was told to complete only the part of the...process-perhaps just the
tightening of a nut-before sliding the flywheel magneto to
the next worker. The
same number of workers now completed a flywheel magneto every thirteen
minutes
and ten seconds
, instead of every twenty
minutes.
38. This excerpt refers to which innovation from the 1920s?
A assembly line
B
electric lights
Celectric radio
D talking picture