gwd23...19语法。。。请解释下o

Q19:（问）

Heavy commitment by an executive to a course of action, especially if it has worked well in the past, makes it likely to miss signs of incipient trouble or misinterpret them when they do appear.

1. Heavy commitment by an executive to a course of action, especially if it has worried well in the past, makes it likely to miss signs of incipient trouble or misinterpret them when they do appear.
2. An executive who is heavily committed to a course of action, especially one that worked well in the past, makes missing signs of incipient trouble or misinterpreting ones likely when they do appear.
3. An executive who is heavily committed to a course of action is likely to miss or misinterpret signs of incipient trouble when they do appear, especially if it has worked well in the past.（这里的it指什么，it可以指代人executive么）
4. Executives’ being heavily committed to a course of action, especially if it has worked well in the past, makes them likely to miss signs of incipient trouble or misinterpreting them when they do appear.
5. Being heavily committed to a course of action, especially one that has worked well in the past, is likely to make an executive miss signs of incipient trouble or misinterpret them when they do appear.

C中的it 指代 a course of action

这题B、C有争议

 is likely to 比makes missing signs of incipient trouble or misinterpreting ones likely 清晰，后者臃肿

动词 or 动词+宾语 〉动词 + 宾语 or  动词+ 宾语

个人总结，不见得正确，请后来者酌情审视