Which of the following sentences is punctuated correctly?

a. we went to the zoo; therefore, i am an expert on penguins.
b. we went to the zoo; therefore i am an expert on penguins.
c. we went to the zoo, therefore, i am an expert on penguins.

Heelo! can you guys me with the following "we are strong enough to stand tall tearlessly, we are brave enough to bend to cry, and we are sad enough to know that we must laugh again." which characteristic does this line from nikki giovanni's speech contain that makes it like a poem? a. rhyme b. imagery c. structure d. repetition