Which functional group allows the sugar glucose to dissolve in blood?

Glucose is an aldose sugar with aldehyde functional group and many hodroxyl groups. These hydroxyl groups tend to increase the solubility of the molecule.

thinking it would be d not too sure but i think it's right

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

i hope this : )