Which one is correct about the boiling points of cis-but-2-ene (A) and trans-but-2-ene (B)?

(A) cis-but-2-ene: $CH_3\text{-}C=C\text{-}CH_3$ with both $H$ atoms on the same side

(B) trans-but-2-ene: $H$ and $CH_3$ on opposite sides of the double bond