Answer:
Use a colon after a complete statement that introduces a list of items.
Step-by-step explanation:
The original or intended sentence is
"I met with managers in the following cities: San Jose, San Francisco, and Los Angeles."
Now, punctuation is the use of different signs or marks to correctly make a sentence. So, in the given sentence, the punctuation used is the colon. And colons are used to list a number of items that come after a complete statement. It is used to introduce a list of items in the sentence.
Thus, the correct answer is the use of the colon after a complete statement and introducing the list of items in the sentence.