问题如下：
In a recession, companies are most likely to adjust their stock of physical capital by:
选项：
A.selling it at fire sale prices.
B.not maintaining equipment.
C.quickly canceling construction activity.
解释：
B is correct.
Physical capital adjustments to downturns come through aging of equipment plus lack of maintenance.
考点：Resource Use Through The Business Cycle
解析：经济衰退时，企业主不会盲目地变卖机器设备或者草率地终止建造，比较稳妥的做法是暂时减少对于即期设备的养护管理费用，让一部分机器先闲置下来。
老师，题目是不是应该改为at the beginning stage of recession啊
