Cara Rafaela wants to learn some ballroom dancing. One dance studio will teach her D₁ = {swing, tango}. Another studio will teach her D₂ = {tango, merengue, salsa}. If she goes to both studios, which set below represents the dance(s) that she will practice the most often?

A. {tango}

B. {swing, tango}

C. {swing, tango, merengue, salsa}

D. {tango, merengue, salsa}