According to "the workers of ellis island" the workforce was small. exhausted. easy going. well organized.

According to 'The workers of Ellis Island', the workforce was well-organised.  

Explanation:

Ellis Island was an immigration inspection station located at Ellis Island in Newyork harbour. Ellis Island had several workers like doctors, nurses, social workers, inspectors etc. Their job was to process thousands of immigrants that came every year.  

Ensuring the legal and medical fitness of the immigrants was the duty of the Ellis Island staff. Most of the immigrants could get through the immigration inspection while some were detained.  

the answer to your question is a. the salt plains

in 1811, he led an expedition, known as the george c. sibley expedition, to improve relations with the pawnee and kansa tribes, and also to locate the rumored jefferson's salt mountain