Why is a column going into the next row when there are only 12 columns?

I have a row with 4 columns that are each 3 wide, which adds up to the 12 that are supposed the be in a row, but for some reason the last one is still going onto a new row. Any idea how to fix this? Here’s my code: <div class=”container text-center”> <h3>Welcome to “Ender’s… Read More Why is a column going into the next row when there are only 12 columns?