Duplicate Result Rows From 2 Table Join

I am using SLQ Server 2008 R2. The database was designed by another company.

I have two tables: Client and Client_Location. In the Client table the pk is Client_ID. There is also a unique key: sys_Client_ID. Both the Client_ID and the sys_Client_ID fields exist as a foreign keys in the Client_Location table. However, the fields are not noted as unique in the Client_Location table. There are two fields in the Client_Location table that determine when the address was effective. They are from_dt and end_dt.

Multiple records have been loaded into the Client_Location table to track old as well as current addresses of clients.

I'm trying to run a report that will pull clients with a plan_id constraint from the Client table and join the Client_Location table to retrieve the current address of these clients.

My SQL is:

select distinct (a.client_id), a.cli_last AS Last_Name,
a.cli_first AS First_Name, a.cli_middle AS Mid_Init,
b.city AS City, b.county AS County, b.state AS State
from ECBH.dbo.tbl_Client a inner join ECBH.dbo.tbl_Client_Location b
on a.client_id = b.client_id
inner join ECBH.dbo.tbl_client_insurance c
on a.client_id = c.client_id
inner join ECBH_TEST.dbo.tbl_GEF_County d
on b.county = d.COUNTY_NAME
where c.plan_id = 4
order by a.cli_last, a.cli_first

Because multiple records exist in the Client_Location table, the result set has duplicates. How can I pull only the results where the from_dt is most recent?