Wnich sentence uses a reflexive pronoun correctly?
they bought concert tickets for me and themselves.
the band signed autographs for my friends and myself.
my friend got the band to take a photo with herself.
they seemed to feel genuinely appreciated by ourselves.

They bought concert tickets for me and themselves

Explanation:

Reflexive pronouns end with -self, -selves

myself      ourselves

yourself    yourselves

himself     themselves

herself

itself

one -(oneself)

We use the reflexive pronoun when the object and the subject in the sentence refer to the same person or thing in the same sentence.

They bought concert tickets for me and themselves.

We can notice the subject They have the same reference as one of the objects Themselves, to the tickets that were bought.

he is suggesting that this widow is a strong woman, who is giving constructive criticism and she has enough to worry about, and she takes care of him, so he does not take it to heart.

your answer is c) experiments with water vapor showed that elements combine in specific proportions.