From studies of the bony house of the brain, which is the cranium, located in the back of the skull, come what scientists know about dinosaur brains.
(A) From studies of the bony house of the brain, which is the cranium, located in the back of the skull, come what scientists know about dinosaur brains.
(B) The knowledge that scientists know about dinosaur brains comes from studies of the bony house of the brain, located in the back of the skull, that is, the cranium.
(C) The knowledge of dinosaur brains that scientists have come from studies of the bony house of the brain, which is located in the back of the skull and is called the cranium.
(D) What scientists know about dinosaur brains comes from studies of the cranium, the bony house of the brain located in the back of the skull.
(E) Located in the back of the skull is the cranium, the bony house of the brain, and it is from studies of this that scientists know what they know about dinosaur brains.
The problem exists in the D
In Ron's free courses, he taught that three things can't be subject: objects of verbs, objects of prepositions, and subordinate caluses.
So in the D, "What...brains" can't be subject of this clause because it is a subordinate clause. The real subject should be "studies of the cranium". If that is the case, the verb should be "come" but not "comes".
I get confused by the "What" clause. I hope you can help me figure out. Thank you very much
Best,
Jackie Zeng