[Dentist Lease] Jaston Rents Space for His New Dental Office

[Dentist Lease] Jaston rents space for his new dental office. He installs a chandelier in the reception area and three new dentist chairs. Ten months into the one-year lease, Jaston decides to sublease one of the offices in his rental to a therapist, and tells the therapist to pay the landlord directly. At the end of the lease term, Jaston decides to close the office and move to a smaller space. The landlord, who apparently never received payment from the therapist, wants Jaston to pay the missing rent payments and also tells Jaston he violated the lease by subleasing the property without permission. The landlord also tells him he cannot take the chandelier and dentist chairs because they are fixtures.
-Is Jaston responsible for the missing portion of rent payments?

A) No, because there was an agreement between Jaston and the therapist.
B) No, unless the amount of the payment is over $500.
C) No, unless the amount of the payment is over $5000.
D) Yes, because the initial tenant is liable for rent payments throughout the entire term of the lease.
E) Yes, because Jaston failed to place the landlord on notice of the sublease.