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')
D. When Antonio suggests to Sebastian the plot to murder Alonso, he gains influence over Sebastian's thoughts.
Capulet thinks Juliet is too young to elope (get married), but cannot refuse Paris. To get more time he asks Count Paris to Court his daughter. It is his way of showing that he knows what is best for Juliet.
