What situation would most likely occur if horseshoe crabs became extinct.
Sandpipers would also become extinct.
The population of laughing gulls would increase in South
America.
Sandpipers would no longer be able to migrate from South
America.
Laughing gulls would start feeding on blue crabs.

Sandpipers would no longer be able to migrate from South America.

Explanation:

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.