Which of the following statements about American colonization of Puerto Rico is LEAST accurate?

A) American colonial officials enjoyed some success at improving the colony's standards of health and education.
B) Puerto Ricans gained American citizenship and male Puerto Ricans gained the right to vote,though the most important government officials were appointed by the U.S.president.
C) American colonization in Puerto Rico resulted in a broad-based prosperity which lifted the masses out of poverty.
D) The acquisition of Puerto Rico raised concerns among many American congressmen who worried that the enfranchisement of black Puerto Ricans would lead black Americans to agitate for their own rights.