Answer:
pros: More stable government, easier to handle, and helps voters to decide on a party.
cons: decreases voters choices, makes an automatic in the vote (automatic- who is going to win the election), and doesn't give third parties a chance to win because the two major parties are already big.
Explanation:
I hope this helps. I haven't done any history courses since my junior year of high school, and that was American government lol.