Although There Are Multiple Strains of Ehrlichia, Affecting Many Species

Although there are multiple strains of Ehrlichia, affecting many species of mammals, what are the two main types of tick that are responsible for the transmitting this disease?

A) The North American tick and the Cattle Fever tick
B) The Lone Star tick and the Brown Dog tick
C) The American Dog tick and the Lone Star tick
D) The Gulf Coast tick and the Brown Dog tick