In addition to proposing amendments, congress can a: call for a popular vote on ratification of the amendment b: bypass state approval and ratify the amendment c: set time limits for ratification d: change the ratification process

C: set time limits for ratification 

The Congress has a legislative type of power, which it means that it has the power to make and propose new laws or amendments. However, the Congress can set time limits for ratification, even if this is not stated clearly in the Constitution.  This practice began with the 18th Amendments, and after taht every amendment that has to be ratify has a deadline for the ratification.

The constant presence of diseases or infectious agents within a given geographic area or population group. it may also refer to the usual prevalence of a given disease with such area or group. it includes holoendemic and hyperendemic diseases. a holoendemic disease is one for which a high prevalent level of infection begins early in life and affects most of the child population, leading to a state of equilibrium such that the adult population shows evidence of the disease much less commonly than do children (malaria in many communities is a holoendemic disease). a hyperendemic disease is one that is constantly present at a high incidence and/or prevalence rate and affects all groups equally. so probably family history.