Black history month is observed in february, the month of Lincoln's birthday and the generally accepted month of Frederick Douglass' birth, since they were each primary figures in the abolition of slavery
a. since they were each
b. who were both
c. because both men were
d. each of whom was one of the
e. both of whom were
a. since they were each
b. who were both
c. because both men were
d. each of whom was one of the
e. both of whom were
