Question

correct the text by inserting one comma. (note: in this skill, serial commas are not optional) rhode island was the last state to ratify the constitution; it didnt do so until may 29 1790.

Explanation:

In dates written in the month-day-year format, a comma is required between the day and the year to follow standard English punctuation rules.

Answer:

Rhode Island was the last state to ratify the Constitution; it didn't do so until May 29, 1790.