Idon't understand prepositional phrases. they just don't make sense to me how do i know what is a prepositional phrase

Plz asap read this sentence from paragraph 3 of the article. the boys and girls are merely asked to obtain the signatures of ten friends or relatives. how does the word "merely" affect the meaning of the sentence? a- it suggests that asking people to subscribe to the washington times is something negative. b- it implies that obtaining ten signatures is not a requirement for receiving a prize. c- it downplays the fact that to win the prize, children must ask people to subscribe to the washington times. d- it emphasizes that children receive the prize only if they obtain ten signatures.

Which of the following is the definition of sufficient evidence? a. offering enough of the types and instances of support, often from other sources, to satisfy the audience b. credible evidence c. relevant evidence d. current evidence

Read this expert from herman melville’s the lightning rod man which contains a mythological allusion mr. jupiter tonans i am not accustom to be commanded in my own house call me now by the paga name you are profane in this time of terror which of these statements best conveys the meaning of the illusion