I also agree that the answer is B: whom
in this sentence you are using the preposition + whom grammar structure. Whom is considered an object pronoun and is used when asking who will receive the action, which in this case, I believe is, baking those cookies. Hopefully this makes sense and good luck.
The best answer for this question would actually be:
B. by showing the human side of international politics
<span>In his speech, the Prime Minister had shown in his speech what has happened in the result of the war, and what they can do in order to change the political system to be able to have order.</span>
Papyrus is the reed material used scientifically to inbust wood power, into what we formally call paper.
<span>In he winter the Big Dipper is in an upright position on the handle.In addition this constellation is closer to the horizon during the winter season.The Big Dipper can be most clearly seen by looking north when looking up at the nighttime sky during fall and winter.</span>
