You will be able to attach standards to each of the questions through the Assessment details. First check the box or boxes next to each question you would like the standard that you will be selecting to apply. Next, Click the actions button to open the drop menu and choose attach standard.

Next, choose the State, subject and grade in the standard selector.  Once you locate the subject click the arrow next to the topic to open the standards. Select the radio button for the standard you want to include then press finish at the bottom left of the standards selector pop up window. Depending on the number of standards for the topic you may need to scroll down to locate the finish button. 

You'll get a confirmation message that the standard was added and you will see the standard listed in the row of the question number.