Folke skoog's laboratory produced an entire plant from a single

Answer; 
Folke Skoog's laboratory produced an entire plant from a single parenchyma cell. 

Explanation; 
Parenchyma cells are thin-walled cells that make up the inside of many non-woody plant structures including the stems, roots and leaves. 
These cells function in storage, photosynthesis, and as the bulk of ground and vascular tissues. 
Folk Skoog and coworkers discovered that stem tissue from tobacco plants that had a portion of vascular present that would undergo cell division in the presence of auxin. 

Di think it’s d shidd

The answer is c) tons