OPTIONS:
A). Utilize homemade 2-by-4 t-braces to assist yourself and a partner when installing the drywall. Rent a cradle lift for assistance if you are installing the drywall panels yourself..
B). Once the drywall is evenly patched, drill holes in its corners with drywall-heavy nails. Pat a thin border of drywall around the windows and ceiling holes with a painter's tack..
C). Drywall laying in a very thin board will sometimes tear when sanding. Have the drywall matted to the ceiling with a grout, and then install a drop back ceiling (tpx-sturdy)..
D). Connect drywall to the new tray wall with a drywall primer. Cover all edges of the new tray wall with drywall compound, paint, and wallpaper, and apply a layer of higher than where you have previously applied the existing wallpaper..Choose from options above and answer: What most naturally follows?

How to build a tray ceiling
Attach drywall to the entire ceiling.
Cut drywall to size with a sharp utility knife and a straightedge. Smoothen the edges of the drywall with coarse sandpaper and a sanding block.
Answer:
A).