The word "dimensions" (Line 5, Para. 2) is nearest in meaning to ______.

A．Every element in Guernica has a clear and accurate reference.
B．Picasso never cared whether or not other people could understand what he painted.
C．Picasso's mural Guernica has caused critics' arguments about its political implications.
D．In Guernica, Picasso painted a Spaniard who looks extremely painful as well as angry.

A．a city in France
B．a Spanish city
C．a town near Paris
D．a small country in Europe