Cheri has a month-to-month tenancy. She pays her rent of $880 on the first day of each month. On January 15, 2019, Cheri received notice from her landlord that her rent would be increasing to $900 per month. When is the first time the landlord can demand the $900 rent from Cheri? 

The landlord can collect the $900 beginning March 1, 2019 

The landlord can collect the $900 on February 1st and every month after 

The landlord can collect the extra $20 on January 15, 2019 and receive $900 on February 1st and thereafter 

None of these answers are correct