Its <u><em>valid</em></u>
VALID is something that is very logical and makes sense in the topic situation
The answer is therefore <u><em>VALID</em></u>
Im going with c only because that answer seems logical
Answer:
Be more specific
Explanation:
maybe they were different because they changed alot while they were away or went through alot.
I don't know a lot but I just did a class about this.
But to change perfect past tense completed in the past by changing the verb is or could be by replacing the verb with the action to was ,did ,before, ect. I think this might help