@joegav1 Could "after a week" not be used as a modifier for the predicate, "produce antibodies...the virus"?

famous dragons being a creature is an assumption?

@cristiangarpec

1. Narrow floorboards v Wide floorboards

2. (not) significantly less expensive

3. Conclusion is that A and B are equal OR that B is winner

Does the answer not mean that the narrow floorboard could be more expensive OR equal in price to the wide floorboards?

It is a negative comparative

I thought AC (E) was correct.

Before I read the answers, I thought, "There is an assumption that smaller cars increases fuel efficiency."

Looking at the answer provided by Sydney, I now understand why "misguided" is a better answer than AC (A)-(C), but I still do not understand why "admirable" is a better answer than "primitive", or right answer period.