Lady Ada Lovelace was a D) visionary, conceiving in the 1830s of mathematical programming used in prototypes of modern computers. The word visionary here describes her "vision" or ability to think up new ideas well before they were being discussed in society.
The answer is A. An easy way to tell if a sentence is using the passive voice is if you add “by zombies” after the first verb. If the sentence still makes sense after you add “by zombies”, then it’s passive voice. If it doesn’t make sense anymore, then it’s active voice. Also, usually if there is more than one verb in the sentence, it’s passive.