Flight Performance & Planning - Mass & Balance

The centre of gravity of an aeroplane is at 25% of the Mean Aerodynamic Chord. This means that the centre of gravity of the aeroplane is situated at 25% of the length of:

A) The aeroplane in relation to the leading edge.
B) The mean aerodynamic chord in relation to the leading edge.
C) The mean aerodynamic chord in relation to the trailing edge.
D) The mean aerodynamic chord in relation to the datum