Respuesta :
Answer:
A.
the worldwide spread of Internet search engines
B.
the worldwide sharing of new flu vaccines
C.
the rapid spread of new flu viruses around the world
D.
the high fertility rate in sub-Saharan Africa
Explanation:
Answer:
A.
the worldwide spread of Internet search engines
B.
the worldwide sharing of new flu vaccines
C.
the rapid spread of new flu viruses around the world
D.
the high fertility rate in sub-Saharan Africa
Explanation:
