Final answer:
The locomotive was not an important invention created at the turn of the 20th century.
Step-by-step explanation:
The locomotive, electric lightbulb, and phonograph were all important inventions created at the turn of the 20th century. However, the one that was not invented at that time is A. The locomotive. The locomotive was actually invented in the early 19th century, with the first successful steam locomotive being developed in 1814 by George Stephenson.
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