Answer:
Birds.
Step-by-step explanation:
The Ebola virus disease is a deadly disease that causes weakness, fatigue and diarrhea. The proper vaccination or treatment of Ebola virus has not been found.
The Ebola virus mainly spread by the contact of the infected bats. The bats are the main transmissible agent for the Ebola virus. The virus can also be spread from the infected person to a healthy person.
Thus, the correct answer is option (B).