Radiation can travel:

Radiation is capable of traveling in all directions from its source, which is why selecting this response is accurate. This characteristic is an intrinsic quality of radiation; it emanates outward and disperses throughout the environment, influenced only by obstacles or materials that may absorb or scatter it.

While it is true that certain types of radiation (like alpha particles) have limited ranges and can be stopped by very thin materials, this does not prevent radiation in general from traveling omnidirectionally when unimpeded. In contrast, other types of radiation, such as gamma rays or beta particles, can travel much longer distances and penetrate various materials. Thus, the idea that radiation can travel in all directions helps in understanding the risks and necessary precautions for emergency responders dealing with radiological hazards.

The other options either imply limitations or specific conditions that do not reflect the general behavior of radiation, making them less accurate.