Answer: The right answer is "take advantage of."
Step-by-step explanation: Just to elaborate a little on the answer, it can be added that in this context seize can be understood as to take advantage of something that is available - although seize also means take control of and grab. What English playwrights did was to take advantage of the fact that in the 16th and 17th centuries there was an interest in both old Greek and Roman classics and native British drama in England in order to create a new form of drama.