49. What kind of ice is ideal for sculpting?
(A) Ice from ice hotels.
(B) Ice from clean water.
(C) Ice with lots of bubbles in it.
(D) Ice weighing over 100 kilograms.

Ice sculpting is a difficult process. First, ice must be carefully selected so that it is suitable for sculpting. Its ideal material is pure, clean water with high clarity. It should also have the minimum amount of air bubbles. Perfectly clear ice blocks weighing 140 kg and measuring 100 cm × 50 cm × 25 cm are available from the Clinebell Company in Colorado. Much larger clear blocks are produced in Europe and Canada or harvested from a frozen river in Sweden. These large ice blocks are used for large ice sculpting events and for building ice hotels.