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Sculptures must, for example, be stable, which requires an understanding
of the properties of mass, weight distribution, and stress.
Paintings must have rigid stretchers so that the canvas will be taut,
and the paint must not deteriorate, crack, or discolor
These are problems that must be overcome by the artists
because they tend to intrude upon his or her conception of the work.

For example, in the early Italian Renaissance, bronze statues of horses
with a raised foreleg usually had a cannonball under that hoof.
In other words, the demands of the laws of physics,
not the scupltor's aesthetic intentions, placed the ball there.

That this device was a necessary structural compromise is clear from
the fact that the cannonball quickly disappeared the scupltors learned
how to strengthen the internal structure of a statue with iron braces
(iron being much stronger than bronze).

Question

Scupltures in the Italian Renaissance stopped using cannonaballs in bronze statues of horse beacause

A.they began using a material that made the statues weigh less
B.they found a way to strengthen the statues internally
C.the aesthetic tastes of the public had changes over tme
D.the cannonaball added too much weight to the statues.


The right answer is














B