When a Landlord Permits a Commercial Tenant to Sub- Let,the

When a landlord permits a commercial tenant to sub- let,the original tenant becomes known as a 'head tenant' and the new tenant as a 'subtenant'.If the property is subsequently damaged as a result of negligence by the subtenant,the landlord:

A) must sue the subtenant before suing the head tenant.
B) must execute a deed of entry to recover his or her loss.
C) may sue the head tenant for the loss.
D) may enter the property and make repairs without giving notice to the head tenant or subtenant.