To determine the correct usage of commas and semicolons in Line 2 of the paragraph, let's first analyze the information given:
Line 2 reads: "The deli will offer free tastings of their most popular sandwiches on Friday, May 10, Saturday, May 11, and Sunday, May 12."
Now, we check to see if there are any places where a semicolon might be more appropriate than a comma. In this case, the list includes three items: "Friday, May 10," "Saturday, May 11," and "Sunday, May 12."
When listing items that include additional descriptors (like dates), commas are used to separate the items; therefore, the original use of commas in Line 2 is indeed correct.
The structure remains:
"The deli will offer free tastings of their most popular sandwiches on Friday, May 10, Saturday, May 11, and Sunday, May 12."
Thus, the original line is correct and does not require any changes to its punctuation.