I felt like A and B are immediately eliminated. No need to go through any logic.. 1. A and B are opposite of each other which means..."if one is helping, then the other one is helping too." But we only need one answer, so I don't need to think about the math, they're both wrong. 2. It says two populations: one wild, the other captive. If A or B is true, then why are they the wild ones??if they're so easy to capture, then they fall into the captive ones...

1. i feel like to add the subject back in is really helpful and easier to understand, it's more like: "some cultivars of corn are much more closely related morphologically to sorghum than some cultivars of corn to most other cultivars of corn."

2. then it's pretty clear to me that it's "sorghum" vs. "most other cultivars of corn"

3. "sorghum" wins.