which provides the best description of the underlined phrase?

walking my dog is a great way to get fresh air and exercise.
a) a noun phrase functioning as the subject
b) a subordinate clause that modifies the noun clause
c) a gerund phrase that functions as the subject of the sentence
d) an infinitive phrase that functions as the verb in the sentence

the answer should be a)directions.

i cannot see a paragraph to answer the question

participle: dressed; modifies: bride.

in night, why are wiesel and his father evacuated from the auschwitz concentration camp? a massive escape makes the nazis question the security of auschwitz. they are assigned to work as laborers in a factory at another camp, buna. hitler has ordered that all remaining jews be relocated within german borders. the german army needs the camp guards to go to the battle front for a last-chance defense.