Mockito Inject mock into Spy object

Question

Class A {
    B b;  
    C c;  
}

Class C {
    D d;  
    E e;  
}

I want to write unit test for A but I do not want to mock methods of C. However, I do want to mock D and E in C.

I have tried these options: Option 1:

@Mock B b;  
@Mock D d;  
@Mock E e;  
@Spy @InjectMocks C c;  
@InjectMocks A a;

Option 2:

@Mock B b;  
@Mock D d;  
@Mock E e;   
@Spy C c = Mockito.spy(new C(d,e));  
@InjectMocks A a;

Option 3: suggestions in Mockito Inject mock into Spy object

None of the options are working for me. Will appreciate any help.