Final answer:
The correct sentence with the usage of commas is: Did you know, Elizabeth, that Missouri and Oregon also have cities named Springfield?
Step-by-step explanation:
The correct sentence with the usage of commas is:
Did you know, Elizabeth, that Missouri and Oregon also have cities named Springfield?
In this sentence, the commas correctly set off the name 'Elizabeth' as an appositive, which provides additional information about the person being addressed. The commas also correctly separate the additional information about Missouri and Oregon having cities named Springfield.
Learn more about Commas in sentence structure