这个题可以解释一下么？感觉这几个行业特点没有很明显

问题如下：

Which of the following is most likely to have a high level of industry risk?

选项：

A.

Toll road

B.

Pest control services company

C.

Oil well drilling service company

解释：

C is correct. An oil well drilling service company operates in a highly competitive industry, where demand is difficult to forecast and is very sensitive to macro risk. Industry risk is therefore likely to be high.

The toll road and the pest control services company have recurring, predictable revenues with significant “moats” or barriers to competition.