Which is inappropriate in a piece of research writing with formal tone.

A: If the cat is clawing furniture, provide a scratching post or two for the cat to use instead.

B: with careful training, cats can even be trained to use the toilet instead of a litterbox

C: I think cats are far more independent than most dogs because my cat often doesn’t obey my commands

D: Cat owners say their cats provide them with loving companionship and affection.

HELPPPPPP