Question

correct the text by inserting two commas. (note: in this skill, serial commas are not optional.)
1
on december 21, 1968, apollo 8, the first spacecraft carrying humans to orbit the moon, was launched from cape canaveral florida, with three astronauts aboard.

Explanation:

1. Add a comma after "1968" to set off the introductory date phrase from the main clause.
2. Add a comma after "moon" to set off the non-restrictive appositive phrase "the first spacecraft carrying humans to orbit the moon" that provides extra information about Apollo 8.
3. Add a comma after "Canaveral" to separate the city (Cape Canaveral) from the state (Florida) in the location phrase.

Answer:

On December 21, 1968, Apollo 8, the first spacecraft carrying humans to orbit the moon, was launched from Cape Canaveral, Florida, with three astronauts aboard.