Answer: its b
Explanation: The bacterium that causes the bubonic plague is called yersinia pestis. It can survive in rodent populations and is spread to other mammals, including humans, through flea bites. ... The 1330s outbreak also spread west across Central Asia via traders using the Silk Road.
What is it do you need help
A secondary source is a experience heard by a primary. pick the one using this definition
The sources of vice, religous threats, and other assualts on traditional values
Generally speaking, the Public Information Officer "<span>Serves as a press secretary for the Agency Executive or Senior Official during the incident," since these people act as "middle men" between the agency and the public. </span>