What are some arguments for and against preserving historical sites like the Oregon Trail?

Which option defines operation paperclip? a. the us government plan to recruit former nazi scientists into the us defense sector to gain a military advantageb. the british government plan to admit former nazi party officials into the military intelligence sector to gain secretsc. the british military plan to use former german administrators to streamline office operations in the defense sectord. the us government plan to appoint captured german mayors to political positions in us cities to rehabilitate themthe correct answer is a.