The correct answer is A. Pushed his motorcycle
Explanation:
A participial phrase is a grammatical construction composed by a participle verb and an object or modifier, participle verbs can be a present participle verb or a past participle verb, in the case of present participle the verb ends in -ing, while for past participle the verb ends in -ed if it is a regular verb or in the past form established if it is an irregular verb. Considering this "Pushed his motorcycle" is a participial phrase as this is composed by a past participle verb (Pushed) and an object (his motorcycle) which is the object affected by the action.