Question with options: can we draw the following hypothesis from the context? 

Context:

More than 6,400 migratory birds and other animals were killed in Nevada by drinking water in the cyanide-laced ponds produced by gold mining operations.

Hypothesis: Animals have died by the thousands from drinking at cyanide-laced holding ponds.
Choices:
[a]. yes
[b]. no
A:
[a].