Our team has won every single match that they have played since January. They seem to be _______.

The blank needs an idiom expressing continuous success or a winning streak.

Option 1 -> rolling in luck -> means having extraordinary good fortune, but not specifically about continuous success.

Option 2 -> rolling in money -> means being very wealthy, which is unrelated to winning matches.

Option 3 -> on a roll -> means experiencing a series of successes or good luck consecutively.

Option 4 -> on a roller coaster -> means experiencing ups and downs or emotional turbulence, opposite of consistent winning.

When someone is on a roll, they're experiencing one success after another, like a winning streak that just keeps going. Picture a bowling ball rolling strike after strike - that's the kind of momentum this idiom captures when everything seems to be going your way.