#feedback I think some more complicated examples here would really be helpful to practice 'kicking it up'. Question 2 was the only one where I found kicking it up to be useful instead of making it more complicated.

Some cultivars of corn are much more closely related to sorghum (A) than they are to other cultivars of corn (B). I was pretty confused until I took a step back and realized the "than to" means the question is asking what "some cultivars of corn" are more closely related to - A or B, with the winner being A. This is different from the than questions we previously looked at. Kaizen101 explains it really well down below.