Object A$\text{'}$s brightness changes every $3$ minutes while object B$\text{'}$s brightness changes every $6$ minutes. This means that $...$

object A$\text{'}$s is probably smaller in diameter than object $B.$

object $A$ is probably larger in diameter than object $B.$

object $A$ is less than half the luminosity of object $B.$

object $A$ is probably hotter than object $B.$

object A$\text{'}$s mass is probably smaller than object B$\text{'}$s mass.