{A} - INCORRECT; Connection issue
{B} - INCORRECT; Not parallel
{C} - CORRECT
{D} - INCORRECT; "While" structure is incomplete
{E} - INCORRECT; protective & dissuade are not two different activities

Am i correct???

While the thorns of all roses are protective, dissuading predators from feeding on the flowers' blooms, unlike roses that grow in temperate climates, though, the thorns of desert roses also serve as reservoirs for water to forestall the ever-present threat of dehydration.

A.While the thorns of all roses are protective, dissuading predators from feeding on the flowers' blooms, unlike roses (While and unlike form a redundant pair. comparison is not logical - thorns are compared with rose))

B.All roses' protective thorns dissuade predators from feeding on their blooms; unlike those (antecedent to those is protective thorn and protective thorn that grow in temperate climate doesnt make sense)

C.The thorns of all roses are protective, dissuading predators from feeding on the flowers' blooms; unlike those of roses (right comparison. one comparison marker. no issue)

D.While all roses' thorns are protective, they dissuade predators from feeding on the flowers' blooms; unlike those of roses (while and unlike are redundant)

E.The thorns of all roses are protective and dissuade predators feeding on their blooms, however, unlike those (those has ambiguous antecedent can be rose or thorns)