Which of the following sentences best supports the idea that Dr. Martin Luther King, Jr. was determined? Choose two.

a
His protest messages sought to show the injustices that were happening all across the country.
b
In his speech, he outlined that America would only be a true democracy if it stopped taking away human rights.
c
Despite his inspirational acts, Martin Luther King, Jr. has faced his own challenges. For example, during some of his peaceful protests, he was arrested.
d
Setbacks only made his determination stronger and helped lead the Civil Rights Movement to success.