The sentence that has a verb in the active voice is B. Guglielmo Marconi perfected a type of radio technology.
The rest of the sentences have their verbs in the passive voice. If you wanted to make a passive sentence out of B, you would say - A type of radio technology was perfected by Gugliermo Marconi.
Answer
try B. Introductory paragraph, sorry if im wrong!
Explanation:
Your answer is, no, sound waves do not always travel in a straight line.
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the correct answer is A
A. They moved to places where they would not be discriminated
against.
I hope I was able to help!!
