Answer:
C. added a prepositional phrase
Step-by-step explanation:
A prepositional phrase is a phrase that contains the following elements:
- A preposition: short words used to link nouns, pronouns, or phrases to other words within a sentence. Examples of prepositions are in, up, after, before, at, with, for, through.
- The object of the preposition, like nouns, pronouns, gerunds, etc.
- And modifiers of the object (Sometimes, not always).
So, the change that was made in the second sentence was the adding of the prepositional phrase " for the history lesson."
In this phrase, "for" is the preposition; "the" is the modifier of the object; and "history lesson" is the object of the preposition.