d/copyright for source having MPL-2.0 + "adaptation from ..."

Hello,

We got a rejection from FTP masters asking to mention SUN Microsystems in 
addition to MPL-2.0.

My question would be, how would you transcribe this into d/copyright given 
that the source file upstream is not precise.

Upstream is here (with its issue for that matter referecing the affected 
source file).
https://github.com/pdeljanov/Symphonia
https://github.com/pdeljanov/Symphonia/issues/255

I found [1] which could match but since it's not in upstream's repo I don't 
really know what is the best.

Some of the options are:

A: Add SUN Microsystems to the copyright holders for * + Add a license named 
SUN-G711 with a single line content: "Adapted from work by SUN Microsystems 
under unrestricted use license."

B: Create a specific section for that file and add SUN Microsystems to the 
copyright holders + Add a license named SUN-G711 with a single line content: 
"Adapted from work by SUN Microsystems under unrestricted use license."

C: Like A but with full text license as found in [1]

D: Like B but with full text license  as found in [1]

[1] https://scancode-licensedb.aboutcode.org/sun-source.html

Which would be best?

Please keep me in copy of the reply.

Regards
Fab