“First, you should realize that the oil industry isn’t just drilling rigs, pumpjacks, and gas stations.” (lines 10-11) – probability

“For most positions, you must have a valid driver’s license.” (lines 35-36) – ability

“You should not have any medical condition which would make it unsafe for you to operate machinery.” (lines 40-41) – obligation

“You don’t need to live in the city where your employer is located, ” (lines 42-43) – remote possibility

“A recent hearing test and/or medical evaluation may be required.” (lines 75-76) – concrete possibility