Answer:
That it is interesting when they talk about dankdoodle memes.
Explanation:
A. The plural possessive forms of the following nouns are:
1. Friend = Friends (Plural) = Friends' (Plural Possessive)
2. Box = Boxes (Plural) = Boxes' (Plural Possessive)
3. House = Houses (Plural) = Houses' (Plural Possessive)
B. The possessive nouns in the following sentences are:
4. Scientists' = correct
5. Peoples' = INCORRECT = People's (Correct)