permissions

Hi experts

i am confused with permission, i have shared folder
for example under Folder A i have Folder B, under Folder B i have Folder C and under Folder C i have Folder D
A
--B
---C
----D
On Folder A inheritance is disabled.
On Folder B inheritance is disabled.
On Folder C inheritance is disabled
On Folder D inhertiance is enabled

I need to give Read Access to user on Folder D if i just give Read Access to user on Folder D will it work.

--------------------------------------------------------------------------------------------------
On Folder A inheritance is enabled.
On Folder B inheritance is disabled.
On Folder C inheritance is disabled
On Folder D inhertiance is disabled

I need to give Read Access to user on Folder D if i just give Read Access to user on Folder D will it work.
------------------------------------------------------------------------------------------
On Folder A inheritance is enabled.
On Folder B inheritance is enabled.
On Folder C inheritance is enabled
On Folder D inhertiance is enabled

I need to give Read Access to user on Folder D , i will give Read Access to user on Folder D and do i need
to give list folder contents permission for this user on Folder A , Folder B and Folder C