Consider the following set of classes: class A(object): def __init__(self): self.al = B) self.a2 = FO self. a3 = "zyxwv" class B(object): def __init__(self): self.bi = 42 self.b2 = E( self.b3 = F) class C(object): def __init__(self): self.cl = DO self.c3 = False class (object): def __init__(self): self.dl - "abcdef" self.d2 = FO self.d3 - A) class E (object): def __init__(self): self.el = 42 self.e2 = CO self.e3 = AO class F(object): def __init__(self): self.fi = EO In the answers below, which of the class pairs illustrate the concept of coupling? Select one: O C and E O D and E O A and C O B and C O B and C