Amy Geiger Had a Two-Year Lease on a Manhattan Apartment

Amy Geiger had a two-year lease on a Manhattan apartment that began on August 1, 2019, and was to run until July 31, 2021 at a rate of $1,200 per month. Amy was assigned to work in the London office of her company from January 1, 2020 until August 31, 2020. Amy wishes to rent her apartment to someone during that time. The landlord:

A) May increase Amy's rent at any time.
B) May not increase Amy's rent at any time.
C) May increase Amy's rent with one month's notice.
D) May increase the rent when Amy subleases the apartment.