What criteria must be met to earn a 3 stars rank?

How do you earn a 3 stars rank in Mario Kart 8?

I saw somewhere that said that you have to cross (the finish line) with 10 coins, or get first place. However, I achieved both cases playing alone and in multiplayer with friends, and no stars were given.

Solution 1:

3 Stars are given if you finish the Grand Prix with 60 points.

In other words, you must reach first place in every race.

Solution 2:

1 Star > Earn 54 or 55 points (Two 1st and Two 2nd place finishes OR Three 1st and One 3rd or 4th Place finish)

2 Stars > Earn 57 Points (Three 1st place finishes and One 2nd place finish)

3 Stars > Earn 60 Points (Four 1st place finishes)