The sentence that is punctuated correctly is option A. On her Mediterranean cruise, Mamie visited Barcelona, Spain; Nice, France; and Pisa, Italy. A semicolon is used in this sentence because more than one of the units in the series are using the punctuation mark commas.
Santa Monica, California
Paris, France
Yulin City, Shaangxi Province, China
Sydney, Australia
You should always look for the questions that may give off the idea that he/she is trying to persuade you. Also statements. For example, "My whole family loves to eat apples. You should try Granny Smith Apples they taste amazing!"