The correct answer is:
A) Light has a dual nature and acts like both a wave and a particle.
This statement is true according to quantum mechanics, which describes light as having both wave-like properties (such as interference and diffraction) and particle-like properties (as represented by photons). The other options are incorrect: light does display interference and diffraction (B), it can travel in various paths (not just straight lines) (C), and it does not need a medium to propagate; it can travel through the vacuum of space (D).