Answer:
In other words, it is so old that it is difficult to imagine.
Explanation:
In this case, the simplest answer is the correct one. It's not about math or science; it's just what it is; the history of the universe is very hard to imagine because is humans haven't been in it for very long.
A gerund may function as a: subject complement, subject, object of preposition, and direct object.
Answers: B), D), E) and F)
Reference: the action of alluding or mentioning something; source; things that you have used for an assignment
It is the antagonist because they are usually looked as an enemy or an opponent and clearly the enemy isn’t a hero, or narrator which leaves us with b and c and b means the same as the hero leaving us with C the antagonist