Ms. D borrowed the amount of one million pesos from Ms. C. Both of them agreed on the following: a) that the said amount should be paid on December 25, 2020; and b) Ms. C cannot demand payment earlier than December 25, 2020. Subsequently, on November 1, 2020, Ms. D became insolvent. Can Ms. C demand the obligation without waiting for December 25, 2020 to come?