Use the Following Figure to Answer the Question

Multiple Choice

Use the following figure to answer the question:
-A spring is stretched 10 cm by a suspended 1-kg block.If two such springs side-by-side are used to suspend the block,so each spring supports half the weight of the block,then each spring will stretch

A) 5 cm.
B) 10 cm.
C) 20 cm.
D) 30 cm.
E) none of these