In his theory, lamarck suggested that organisms will develop and pass on to offspring variations that they need in order to survive in a particular environment. in a later theory, darwin proposed that changing environmental conditions favor certain variations that promote the survival of organisms. which statement is best illustrated by this information? (a) scientific theories that have been changed are the only ones supported by scientists. (b) all scientific theories are subject to change and improvement. (c) most scientific theories are the outcome of a single hypothesis. (d) scientific theories are not subject to change.

The correct answer would be (b) All scientific theories are subject to change and improvement.

Explanation:

No theory is considered the absolute truth, although some have been proved and deeply studied, through years many theories that were considered completely true, have become incomplete or false. Therefore, as true and correct a theory sounds, it can still be proved wrong in the future.

the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.