Sugars are large, hydrophilic molecules that are imporatant energy source for cells. how can they enter cells from an enviorment with a very high concentration of sugar
a- simple diffusion
b- osmosis
c- active transport

Active transport is the transfer or minerals and protein to cells.

C - Active transport. You have to realize that sugar won't 'naturally' enter in a Cell, so Osmosis and Simple Diffusion (Both are 'natural processes which there is no energy consume) won't be able to bring sugar inside the cell. So it's going to be necessary SPENT energy to bring this sugar. Remember that always that something is not 'spontaneous', it's going to be necessary to use energy to do it.