Which sentence does not contain any errors in comma usage?

a. we could go downtown today or we could just relax at home.

b. the new mother was tired, but she was smiling proudly.

c. i finished painting hours ago yet the walls are still wet.

d. he walked to the rope grabbed it tightly, and climbed to the top.

Which sentence is an example of first person narration? a. guess where i'm going? martin's sister said as she ran out of the house. b. where are you going? i asked my sister as she ran out of the house. c. where are you going? you ask your sister as she runs out of the house. d. where are you going? martin asked his sister as she runs of the house.