A) Both Gerasim and Praskovya Fedorovna are honest about their motives, but only Gerasim genuinely cares for Ivan Ilyich.
It literally says it right here: "Gerasim alone did not lie; everything showed that he alone understood the facts of the case and did not consider it necessary to disguise them, but simply felt SORRY for his emaciated and enfeebled master. Once when Ivan Ilyich was sending him away he even said straight out: "We shall all of us die, so why should I grudge a little trouble?"