At point O, two straight lines AB and CD intersect. Ray OE lies between OC and OD. If ∠AOC = 70° and ∠COE = 25°, which one of the following statements is correct?
a) ∠COE and ∠EOD form a linear pair
b) ∠BOE and ∠COE are supplementary
c) ∠AOE and ∠EOD form a linear pair
d) ∠AOC and ∠BOE are vertically opposite