I think they should have let people sign a petition to decide if they wanting to let migrants work or not.
A. Irony sorry I mite not have a explanation
In the sentence:
My best friend wrote a funny poem about her pet rabbit.
The simple subject is 'friend'. Remember that a simple subject is the main word or words in a subject, so it does not include any of the modifiers that might describe, characterize or restrict the subject (in this case, the possesive 'my' and the adjective 'best')