Respuesta :
The answer would be A. Both "I thought about what he'd said" and "Soon I realized he was right" are independent clauses that are not linked with a conjunction.
A.
It should be written as: I though about what he'd said, soon I realized he was right.
But since there is no comma, it makes it a run-on sentence
It should be written as: I though about what he'd said, soon I realized he was right.
But since there is no comma, it makes it a run-on sentence