One of the Ongoing Problems for Wild California Condors Is

One of the ongoing problems for wild California condors is ________________.

A) that they readily succumb to sylvatic plague,which can ravage an entire colony of condors in a matter of weeks
B) that there are so few of them that they cannot find mates
C) that the federal government refuses to list the condor as being endangered because doing so would have a negative impact on the oil and gas industry
D) that people continue to hunt condors for sport,despite the bird's being listed as federally endangered and despite the educational campaigns that teach young people the value of having condors in an ecosystem
E) that lead shot is still used for hunting,and the lead can build up in a condor's system because condors eat dead animals that have been shot