[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.
-Did Jaston violate the lease agreement by subleasing the property without permission?

A) No, a tenant is always allowed to sublease property as long as payment of rent is timely and complete.
B) No, a tenant who rents commercial property may sublease property without the landlord's permission.
C) No, unless subleasing was specifically prohibited by the lease.
D) Yes, unlike residential tenants, commercial tenants must have the landlord's written permission to sublease any portion of property.
E) Yes, a tenant must have the landlord's permission to sublease property.