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Difficulty: HardColons, Semicolons, and Dashes

Based on the rules of Standard English conventions, what punctuation mark should be inserted into both blanks to correctly separate the items in the complex list?

Answer:In analyzing the migration patterns of monarch butterflies, researchers tracked coordinates across three distinct staging areas: Angangueo, Mexico【;】 Sierra Vista, Arizona【;】 and Santa Cruz, California.

Answer

A semicolon (;) must be placed in both blanks.
The correct punctuation is a semicolon (;). Under the conventions of Standard English, semicolons are used as 'super-commas' to separate items in a list when one or more of those items already contain internal punctuation, such as commas separating cities and states/countries.

Step-by-Step Solution

1
Identify that the sentence contains a list of geographical locations, each consisting of a city and a state or country (e.g., 'Angangueo, Mexico').
Recognized that these list items already contain internal punctuation (commas separating the city and state/country).
Understanding the structure of the list items is necessary to determine the correct separator.
2
Determine the punctuation required to separate list items that contain internal commas.
Standard English conventions require using semicolons rather than commas to separate the items to prevent confusion.
Using commas as separators would create a confusing string of commas, making it unclear where each item begins and ends.

Key Concept

Using Semicolons in a Complex List
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Topics

Colons, Semicolons, and Dashes

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