Contract between parties A,B,C,D

This is not an actual instance, just a question posed at work for the heck of it.

If A bought a house of B(Builder).

B employed C (Tradesman) for supply and install of say plumbing.

C bought all materials from D(Merchant).

Now, C never paid D in full and out of business. D had looked for money or as noted on invoice materials returned.

C has already installed materials in B's house.

B has already sold house to A. Deeds etc in the bank safe.

Has D any recourse to recover possible items from A now.

My thinking is that D had contract with C and not A/B so any and all liability lay with C. Once he was liquidated all "liabilities" rest with that.
B hired C regardless but moreover B sold house to A with completed deeds now so basically D has no rights whatsoever to enter onto A's property without permission to ring a doorbell no mind recover items not paid for by C????

Just curious as to how this may play out in a real life situation. I'm sure it's repeated time over in the current climate.