An example of such a sentence could be: I was BORED during our math class.
A participle is usually used as an adjective within a sentence. Participles are made from verbs - those are those forms used to make tenses such as present perfect, past perfect, etc.
The word which is modified by the participle is the subject of the sentence - the pronoun I.
The answer is B. <span>Johnson’s argument effectively asks the American people and the government to work together to ensure equal rights for all Americans.</span>