Which of the following statements is true
| A. |
The Aedes mosquito is primarly responsible for the transmission of malaria |
| B. |
The term "black death" refers to blue-black haemorrhages under the skin seen in bubonic plageu victims |
| C. |
In addition to spreading epidermic typhus, mosquitoes also are primarly responsible for transmitting the organisms associated with trench fever and relapsing fever. |
 |
| D. |
A biological vectro is an organism, usually an arthopod, in which the agent of disease normally passes through some developmental stage (s) including sexual reproduction, before being transimtted by the vector to susceptible host. |