A simply supported laterally loaded beam was found to deflect

A simply supported laterally loaded beam was found to deflect more than a specified value. Which of the following measures will reduce deflection?

1. Increase the area moment of inertia
2. Increase the span of the beam
3. Select a different material having lesser modulus of elasticity
4. Magnitude of the load to be increased

From differential equation of elastic curve

EI	d²y	= M
	dx²

where y = deflection of beam.
As the I = Area moment increases, the deflection will reduce.