What legendary gospel singer sang just prior to dr. martin luther king jr.'s "i have a dream" speech during the march on washington?

Mahalia Jackson, is the right answer.

Explanation:

It was next to impossible without Mahalia Jackson, that  "I Have a Dream" of Martin Luther King Jr., the speech took place. The Queen of Gospel is the title given to Jackson. She was a vocal legend who served lead gospel from church to a wider population. She became the first singer to win a Grammy in the year 1961. She remained one of the significant figures in the civil rights movement.

how did the great awakening contribute to the develpment of the united states

according to this text from the preamble to the declaration, who gives men their unalienable rights?