Sunlight Passing Through a Pinhole in a Piece of Card

Multiple Choice

Sunlight passing through a pinhole in a piece of card casts a solar image on the ground. If the card is held so the image exactly covers a coin, measurements will show you could fit 110 coins between the image and the card. This further tells you

A) 110 Suns would fit between the top of the card and the Sun.
B) that this activity is useful for estimating the Sun's diameter.
C) both of these
D) neither of these