UNIT 3. In the text " The invention of the Radio" it is CORRECT to say:  ?

UNIT 3. In the text " The invention of the Radio" it is CORRECT to say: 

a)One possible answer for the question “How did the radio originate?” would be “The radio originates from...” b)The sentence “Many cientists [...] didn’t succeed until the late nineteenth century.” is written this way in the affirmative form: “Many cientists [...] succeed until the late nineteenth century.” c)In the sentence “Augusto Righi [...] continued and and refined Hertz’s work [...]” we have two regular verbs in the affirmative form in the Simple Present.. d)The sentence “Marconi verified that electronic waves travel between two points separated by an obstacle.” is written this way in the interrogative form:: “Marconi verify that electronic waves travel between two points separated by an obstacle?” e)According to the text, Augusto Righi was an Italian physicist who continued Heinrich Hertz's work.