Mostly he babbled instructions to a tree, thinking it was his assistant Percy Weasley, but then, his Imperius curse wearing off, he stammered that he has to see Dumbledore. (GoF28 'The Madness of Mr. Crouch', pp. 553-556). I hope my answer has come to your help. God bless and have a nice day ahead!
Answer:
b.) subject-verb disagreement
Explanation:
S V
China, a country with many people, <u>GROWS</u> a lot of rice.