Respuesta :

The infinitive phrase here  is the one that includes the infinitive, that is "to do" so the whole phrase is "to do one's best"

and its subject? well, it takes the role of the subject in the sentence itself (compare "success is the ultimate goal" where the success takes this role) - but its object is "one's best".
millermoldwarp

Answer:  The correct answer is : The phrase in the infinitive is: To do one's best

The theme is: The triumph is the final goal but the desired, the goal to achieve is "one's best".

Explanation:   A phrase in the infinitive is one that has one or more verbs in infinitive mode. The infinitive is a non-personal verbal form since the verb has no mode, person, time or number. The infinitive is formed with "to" + basic form of the verb. In the case of the sentence of the question, it would be: To do