In the reading, The Real Ambassador, the jazz trumpeter Louis Armstrong was angry at President Eisenhower because:

a$.$ Armstrong thought Eisenhower wasn't moving fast enough to desegregate Central High School in Little Rock, Arkansas.

b$.$ Armstrong was angry at Eisenhower for praising Central High School in Little Rock, Arkansas for its segregated policies.

c$.$ Armstrong wanted to visit Asian countries along with African nations, but Eisenhower did not permit it$.$

d$.$ Armstrong and Eisenhower got along well; they didn't express any anger toward one another.