Article VIII Those who shall prefer to remain in the said territories, may either retain the title and rights of Mexican citizens, or acquire those of citizens of the United States. But they shall be under the obligation to make their election [choice] within one year from the date of the exchange of ratifications of this treaty; and those who shall remain in the said territories after the expiration of that year, without having declared their intention to retain the character of Mexicans, shall be considered to have elected to become citizens of the United States. . . . present owners, the heirs of these, and all Mexicans who may hereafter acquire said property by contract, shall enjoy with respect to it guarantees equally ample as if the same belonged to citizens of the United States.
—Treaty of Guadalupe Hidalgo, February 2, 1848

Which of the following was NOT a citizenship option for Mexicans living in the United States after the Treaty of Guadalupe Hidalgo?

Mexicans could elect to become United States citizens.

Mexicans could return to Mexico and forfeit American citizenship.

Mexicans could declare dual citizenship in the United States and in Mexico.

Mexicans could continue to live in the United States and maintain Mexican citizenship.