Question: What was the group that used incendiaries and high explosives to mark targets?
Answer: Special units, such as KGr 100, became the Beleuchtergruppe (Firelighter Group), which used incendiaries and high explosive to mark the target area.
A single-select problem: Is the question answered in a satisfactory fashion?

Options are:
[i] yes.
[ii] no.
[i]