Which words are the first and last words of the participial phrase in this sentence?

We went over the whole chapter, beginning with the first page.

Aover chapter

Bbeginning page

Cbeginning with

Dwent chapter

Which words are the first and last words of the participial phrase in this sentence?

Polished with several layers of wax, the floors were amazingly beautiful.

Apolished with

Bpolished wax

Cfloors beautiful

Dfloors were