To determine the best description of the purpose and effect of the fifth paragraph of the essay, one would need to analyze the content of that specific paragraph. Since the fifth paragraph isn't provided in your message, I can't definitively say which option (A, B, C, or D) is correct.
However, you can read through the paragraph and consider the main ideas and themes it presents. If it discusses Lamarr's marriage, then option A would be the right choice. If it focuses on her involvement in technological advances, then option B is appropriate. If it talks about her success in Hollywood, then option C fits. Finally, if it critiques her contributions to technology, option D would be accurate.
If you can share the content of the fifth paragraph, I'd be happy to help you analyze it further!