Mr. D is a 40-year-old man who has extreme difficulty functioning in his job as a lineman with the telephone company because of his peripheral vascular disease. In helping him determine job modifications which may be necessary, or other jobs which are more appropriate, you would consider that with his current condition the specific limitation(s) he experiences is/are?
1) difficulty breathing and chest pain on exertion
2) fainting when he moves rapidly
3) pain in his lower extremities when walking small distances
4) dizziness