The Russian government, in response to the actions of an American adoptive mother who sent her adopted son back to Russia, may demand that an American adoptive parent provide his or her child with an environment that preserves the child’s Russian language and culture; some argue that such actions could sacrifice children's lives to a phantom national interest.

(A) may demand that an American adoptive parent provide his or her child with an environment that preserves the child’s Russian language and culture; some argue that such actions could sacrifice children's lives to a phantom national interest.

(B) may demand an American adoptive parent provide his or her child with an environment that preserves the child’s Russian language and culture; some argue that such actions could sacrifice children's lives to a phantom national interest.

(C) may demand that an American adoptive parent provide his or her child with an environment that preserves the child’s Russian language and culture, and actions could sacrifice children's lives to a phantom national interest.

(D) may demand that an American adoptive parent provide his or her child with an environment that preserves the child’s Russian language and culture; actions that could sacrifice children's lives to a phantom national interest.

(E) may demand that an American adoptive parent provides his or her child with an environment that preserves the child’s Russian language and culture; some argue that such actions could sacrifice children's lives to a phantom national interest.
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In the study cave!

Probably a stupid query but nonetheless ....

Isn't "American adoptive parent" a singular subject?
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Please give Kudos if you like the post

That's really true subjunctive verb must always have plural verb.
But i would like to point out that had the subjunctive not used it would have been "Provides" because parent is singular.
Parents is plural
Hope that answer your query

Consider kudos if my post helps!!!

Archit