I believe the correct answer is artificial.
Mary Wollstonecraft’s “The Vindication of the
Rights of Woman” had for the main purpose to convince the readers to accept her
point of view – that women’s weakness was artificial. She believed that women’s
minds were “flowers planted in soil that is too rich”, so they had no
weaknesses compared to men.
A singular verb would be used with a singular noun (she, Bob, Jane, truck) while a plural verb would be used with a plural noun (they, cars, books).
For example "The truck drives away." Truck being a singular noun and drives being a singular verb.
Another example
"The cars drive away." cars being a plural noun and drive being the plural verb.
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the answer is a and d im not 100% sure about d but I'm sure enough
Hope it helps