Which compound sentence correctly combines the simple sentences?

my brother practices the drums every day. he is improving.

a.
my brother practices the drums every day; and he is improving.

b.
my brother practices the drums every day he is improving.

c.
my brother practices the drums every day, and he is improving.

i believe it is c, am i correct?

Which kind of narrator knows the thoughts and see all of the charters in the story

Aspy novel would probably be a novel of

Choose the sentence that is not logically connected in the paragraph. (1) it all happened late one night after the family had gone to bed. (2) jack was lying in bed when he remembered he had left the groceries on the back seat of the car. in the paper bag was a carton of ice cream. (3) the ice cream would melt during the warm summer night. (4) he put it in the refrigerator.