[求助] gwd31第一套Q1

According to a survey of graduating medical students conducted by the Association of American Medical Colleges, minority graduates are nearly four times more likely than are other graduates in planning to practice in socioeconomically deprived areas.

1. minority graduates are nearly four times more likely than are other graduates in planning to practice

2. minority graduates are nearly four times more likely than other graduates who plan on practicing

3. minority graduates are nearly four times as likely as other graduates to plan on practicing

4. it is nearly four times more likely that minority graduates rather than other graduates will plan to practice

5. it is nearly four times as likely for minority graduates than other graduates to plan to practical

I understand the above answer is A, due to parallelism. However, I recently found another similar question but the answer is without the verb "to-be", the answer is B as the below picture. Please help me to explain why the above question needs an "are" and the below does not need a "was".