What will occur if a white dwarf in a binary exceeds its Roche [ROSH] lobe?

W) Its companion will transfer mass to it until it shrinks below its Roche lobe

X) It will form a planetary nebula

Y) It will continue to expand and ablate onto its companion

Z) It will transfer matter to its companion until it shrinks below its Roche lobe
Z) IT WILL TRANSFER MATTER TO ITS COMPANION UNTIL IT SHRINKS BELOW ITS ROCHE LOBE