From the following list of observations, choose the one that most clearly supports the conclusion that electromagnetic radiation has wave characteristics.
A) the emission spectrum of hydrogenB) the photoelectric effectC) the scattering of alpha particles by metal foilD) diffractionE) cathode "rays"

Diffraction

Explanation:

Electromagnetic radiations are of dual nature i.e. they have both wave nature and particle nature.  

When a beam of light or waves are passed through a narrow hole, it gets spread out. This phenomenon is called diffraction. Diffraction is only possible, if beam of light has wave character. Light is also an electromagnetic radiation. Therefore, wave nature is supported of electromagnetic radiation is supported by diffraction.

c)red bank

explanation:

red bank is a borough in monmouth county, new jersey, incorporated in 1908 and located on the navesink river, the area's original transportation route to the ocean and other ports.