In a narrative, a lot that you learn about the plot and the characters (more importantly the main character) is through dialogue. If dialogue isn't effective in a narrative, your reader may not capture the situation that the characters are facing nor the personalities and of these characters.
It depends on the time signature. If it's in 4/4, the answer would be 3
Im not 100% sure, but i think its D. Handel influenced the Royal Academy of Music; Monteverdi did not.