hellooo I am interested is the group still open to join?

I am not fully convinced by JY's explanation of AC B. He reasoned that the nuclear furnace incomplete mixing thing is only applicable to brown dwarf, so AC B is wrong in the way that it includes "any celestial objects". BUT the passage discusses about starts with a greater mass than the sun have a nuclear furnace which does not fully mix the lithium. Therefore JY's explanation is incorrect.

Can someone tell if I misunderstood something? #help

AC D does not specify which primroses are located in suboptimal soil. You cannot assume it is only the non-self-pollinating primroses are the only ones getting bad soil. It’s possible that self-pollinating ones also live in the same areas, therefore D does not explain why non sp primroses are rare. Hope this helps.