The two correct responses that share a characteristic with sunspots, solar flares, and coronal mass ejections are:
- They tend to occur during active periods of the solar cycle.
- They are caused by outward fluctuations of the sun's magnetic field.
Sunspots are indeed dark spots seen on the sun's surface due to lower temperatures, while solar flares and coronal mass ejections result from the sun's magnetic field activity, particularly during solar maximum phases of the solar cycle.