Read the sentence

Martin Luther King's voice rolled like thunder over the crowd at the Lincoln Memorial.

Which best interprets the underlined figurative language in this sentence?

A.) It means Martin Luther King's speech occurred during a rain storm

B.) It means Martin Luther King's voice had a strong power over his audience

C.) It means that no one listened to Martin Luther King's speech.

( By the way Martin Luther King's voice rolled like thunder is supposed to be underlined )