Click and drag answers to change the order, or select using ↹ Tab then move by pressing Space and the ↑ ↓ arrows on your keyboard.
original sources from the time period being studied
sources that do not give original information
the detailed study of a subject
primary information sources
secondary information sources
To pick up a draggable item, press the space bar.
While dragging, use the arrow keys to move the item.
Press space again to drop the item in its new position, or press escape to cancel.