Answer:
The answer should be D
Step-by-step explanation:
By giving the people a chance to elect their senators they have more control of who they want to be in their government.
The question doesn't state that it lessened the importance of political parties in fact since the people were allowed to elect they grew and encouraged people to vote.
Experienced senators or not the people where the ones to know who they would pick so it isn't just experienced senators.
If not I found a source that could also bring the answer to C-
The 17th Amendment helped eliminate corruption and reduce the influence of political machines by allowing Americans to directly elect U.S. senators.
I hope this is correct good luck!