If red light can cause an electron to be ejected from the surface of a piece of cobalt which of the following statements is most likely true?

If red light can cause an electron to be ejected from the surface of cobalt, it suggests that the energy of the red light photons is sufficient to overcome the work function of cobalt. This implies that cobalt has a relatively low work function, allowing for electron ejection at lower energy (longer wavelength) light, which is unusual since most metals require higher energy (shorter wavelength) light. Therefore, it can be inferred that cobalt has unique electronic properties compared to typical metals.