How does the epidemiological transition explain causes of changing death rates?

The answer is b or dmost likely bhope it

81 is a composite number

This would be an open primary. a closed primary people can vote only prior to election day if the party if they are registered. independent voters can not participate. there is not a wide-open primary, but there is a semi-open primary.

This question has already been answered by someone else.here is a link.  hope that it .