whiCh oF thE Following ABout mugglE kiDs AnD thE sixth instAllmEnt oF thE hArry pottEr sEriEs is truE
A．thEy FinD it intErEsting.
B．thEy think it is too long.
C．thEy FinD it hArD to unDErstAnD.
D．thEy think it is morE sErious thAn Any othEr Books.