C) Magnate
Magnate means a wealthy and/or influential person
I believe that an image of a hero would change over time D. to appeal to what modern-day audiences like and expect.
Heroes in the literature of the past were quite different from what we are used to in the modern day. So, the authors need to adapt their heroes a bit in order to suit the needs of modern-day audience who wants to read about something a little bit more contemporary.
The speaker is most likely going to be the author, as the usage of "I" is constant in the poem.
Therefore the author William Wordsworth is most likely your answer
hope this helps