To What Extent Do Spicules Cover the Chromosphere

Multiple Choice

To what extent do spicules cover the chromosphere?

A) The chromosphere is always completely covered by spicules.
B) Spicules cover most but not all of the chromosphere.
C) Spicules cover a few percent of the chromosphere.
D) Spicules are rare and only appear during the height of the solar cycle maximum.