DRAG DROP
A SQL Server Integration Services (SSIS) project has been deployed to the SSIS catalog.
The project includes a project Connection Manager to connect to the data warehouse.
The SSIS catalog includes two Environments:
Development
QA
Each Environment defines a single Environment Variable named ConnectionString of type
string. The value of each variable consists of the connection string to the development or QA
data warehouses.
You need to be able to execute deployed packages by using either of the defined
Environments.
Which three actions should you perform in sequence? (To answer, move the appropriate
actions from the list of actions to the answer area and arrange them in the correct order.)
Answer: 
Add permissions
Add references
Assign the Environment variable value to the property
Add the Environment reference to the deployed project.
In the deployed project …
Execute …
this seems right
this one is right the previous one you posted was not
Deploy…
In the deployed project…
Execute…
It seems to be the right answer
No,
1. Add Env Reference
2. In the deployed project
3. Execute
Se link below posted by et
this is correct
But I think in the deployed Package not Project
http://stackoverflow.com/questions/15206184/how-to-configure-ssis-2012-project-to-run-under-different-environment-configurat
Dave’s answer is correct.
You have to read the questions more carefully.
It’s said that project is already deployed.
Dave is correct
Dave is right.
Add reference to deployed project
in the deployed project …
execute
Read carefully.. It has already been deployed!
Dave is right
add the Enviroment reference to the deployed project
In the deployed project…
Execute the deployed package…