Which of the Following Are the Correct Roots and Definitions

Which of the following are the correct roots and definitions for the term pathogen?

A) path/o (development, nourishment) + gen (generation, cause) = pathogen (development or nourishment of the cause)
B) path/o (development, nourishment) + gen (suffering, disease) = pathogen (development or nourishment of the suffering/disease)
C) path/o (generation, cause) + gen (suffering, disease) = pathogen (generation/cause of the suffering/disease)
D) path/o (suffering, disease) + gen (development, nourishment) = pathogen (development or nourishment of the suffering/disease)
E) path/o (suffering, disease) + gen (generation, cause) = pathogen (generation/cause of the suffering/disease)