Which of the following would be a good topic sentence for a classification paragraph?
A. There are three main types of marine mammals known as
pinnipeds that frequent Ano Nuevo Point on the central California
coast.
B. My new necklace has three parts.
C. Normally, Miles Davis plays his trumpet with a soft, gentle tone,
but there are some times when he lets it rip.
D. The Flying Karamazov Brothers put on a circus show unlike any
other.

taking into account that a theme is the central topic a text treats and can be developed through a story, play, poem etc. the following are themes that can be further developed:  

my best friend jeffrey has many unusual interests. (the story could be about each of the unususal interests)

once a man gives his soul over to evil, he can never go back. (this could be a saying or a proverb)

the three sheepdogs lay around the yard all day. (it could be developed detailing how each of these sheepdogs lay around)

a priest's collar has an unusual effect upon people. (it could be developed detailing the different effect upon people)

innocence is a powerful force in a world full of corruption. (it could be developed detailing how is a world full of corruption)

king lear is a play shakespeare wrote later. (it is just a sentence and doesnt give any idea or topic to be discussed in details.

evil often wears the disguise of innocence. (this could be a saying or a proverb)

i think it would be b

what are the questions?

btw i'm in apex to !