May I suggest that we send a technician to inspect the equipment

May I suggest that we send a technician to inspect the equipment and make the necessary repairs at a ______cost?
A、reasoned
B、realistic
C、realizable
D、reasonable
【正确答案】：D
【题目解析】：我可否建议，我方派一名技术员对设备进行检查并在合理的价格内进行必要的修理？reasonable意为“（价格等）公道的，合理的”，符合题意。reasoned意为“理由充足的”；realistic意为“现实的”；realizable意为“可以实现的”。