Which of the following will dissolve at the fastest rate?

15g of sugar cubes in 120 g of water at 60 degrees C

15g of sugar cubes in 120 g of water at 20 degrees C

15g of granulated (crushed) sugar in 120 g of water at 50 degrees C

15 g of granulated (crushed) sugar in 120 g of water at 20 degrees C