Economics [demand and supply (equilibrium)]

I think both arguments are correct, because:
Gillian consider that as supply increases, the supply curve will shift to the right with same demand, price will fall.
But Charlene also consider the increase in demand as people is expecting the share prices will rise, hence demand curve will shift to the right. This effect on rise in price is larger than the fall in price by the supply curve rightwards move. Thus price will rise.