Question

correct the text by inserting two commas. (note: in this skill, serial commas are not optional.) on may 7 1915 a german submarine sank the lusitania, a british passenger ship.

Explanation:

To correct the text, we need to insert commas for proper date formatting and to separate the introductory phrase. The date "May 7, 1915" requires a comma between the day and year, and a comma after the date to separate it from the main clause.

Answer:

On May 7, 1915, a German submarine sank the Lusitania, a British passenger ship.