Jnbvghzisjns disks riffs dorbd
The answer is D Cats are the smartest animals.
It is predominantly two syllables per stress, weak-strong, so it is iambic. The refrain is basically dactyllic, with an extra beat at the end, but the narrative part is iambic.
For only this line, Note the pattern of stressed syllables:
HICK-o-ry DICK-o-ry DOCK --- that's (principally) dactylic
