An African- American who contributed greatly to the growth of nationalism  in West Africa was _______

Analyze the question: It asks for an African-American (a Black person from the USA) who contributed greatly to the growth of nationalism in West Africa.

Explain the concept: Pan-Africanism was a movement that encouraged unity and independence for people of African descent. It influenced West African nationalists such as Kwame Nkrumah, Nnamdi Azikiwe and Herbert Macaulay. Its main promoters from the Americas and the Caribbean were:

• W.E.B. Du Bois (African-American), who organized the Pan-African Congresses (starting in 1919) and later settled in Ghana
• Marcus Garvey (Jamaican), who founded the UNIA and the "Back to Africa" idea
• George Padmore (from Trinidad)

Go through the options:

• A. Martin Luther King was an African-American, but his work centered on civil rights in the USA, not on West African nationalism.
• B. Jesse Jackson is also an American civil rights activist, with no major link to West African nationalism.
• C. Nelson Mandela was South African, not African-American, and he fought apartheid.
• D. William (W.E.B.) Du Bois was an African-American scholar and activist, often called the "Father of Pan-Africanism." His Pan-African Congresses and writings inspired West African nationalists, and he died in Ghana in 1963.

Answer: The correct option is D. William Du Bois.

Tip: For "African-American + nationalism in West Africa," think Du Bois (Pan-African Congresses). For "Jamaican + Back to Africa," think Marcus Garvey. Remember: Du Bois = Congresses, Garvey = UNIA.