Running at full speed, the sprinter soared across the finish line.

What kind of phrase or clause is used in the beginning of this sentence and what does it modify?
Responses a dependent clause that modifies an entire sentence a dependent clause that modifies an entire sentence a prepositional phrase that modifies soared a prepositional phrase that modifies soared a participial phrase that modifies sprinter a participial phrase that modifies sprinter a relative clause that modifies finish line

A participial phrase that modifies sprinter