Which of the following best describes the characteristics of a "scientific" poll?
a. digit dialing from a small population with random selection
b. a sample of at least 1,000 people with no selection bias
c. random digit dialing with social desirability effect on a sufficiently large population
d. representative sample from a sufficiently large population with no selection bias

d. representative sample from a sufficiently large population with no selection bias.

Explanation:

it is a better alternative

not  

cuba  

russia  

iraq  

el salvador  

explanation:

known as the land of volcanoes, el salvador has visit seismic tremors and volcanic movement. it is the main nation in central america that does not have a coastline on the caribbean sea. about portion of all salvadorans live in the wide open. they are poor and don't have power or running water in their homes. in 1525, pedro de alvarado, a lieutenant of cortés's, vanquished el salvador. el salvador, with alternate nations of central america, pronounced its freedom from spain on sept. 15, 1821, and was a piece of a league of central american states until the point when that association broke up in 1838.