Final answer:
The subject of the question is the improvement of Princess's cuisine affecting the opening of new boutiques by either Azmara or Seabourn.
Step-by-step explanation:
In this statement, the subject is the cuisine improvement of Princess cruiseline.
It is saying that either Azmara or Seabourn will not open new boutiques if Princess improves its cuisine.
This is an example of a conditional statement that uses the structure 'if...then...'. It states that if Princess improves its cuisine, then either Azmara or Seabourn will not open new boutiques.