Step-by-step explanation:
The correct answers are:
a. The susceptibility of the host b. The age of the new host c. The degree of pathogen exposure e. The functionality of the new host's immune system
The likelihood of an infectious agent being spread from one host to another can be impacted by a range of factors, but the four options listed above are among the most significant. The susceptibility of the host refers to the likelihood of that individual becoming infected, which can be influenced by a range of factors including genetics, pre-existing health conditions, and lifestyle factors. The age of the new host can also be a significant factor, with children and the elderly often being more susceptible to infectious diseases. The degree of pathogen exposure refers to the amount of the infectious agent that is present and the length of time the host is exposed to it. Finally, the functionality of the new host's immune system is a key determinant of whether they will be able to fight off the infection or not.