Allusion-a reference to a statement, person, place, event, or thing well known from literature, history, religion, pop culture, etc.
No it is not, decide is a verb.
When the Hungarian police finally <span>arrived to round up the Jews in </span>the ghetto,<span> Wiesel </span><span>and his sisters help the Jewish police to secretly bring water to thirsty children </span>who were sent outside of the street.<span> The irony in the story is that t</span><span>he people were happy despite the fact that they were about to be </span>deported. This is because they no longer have to stay for a long time under the sun.<span> </span>
The most appropriate linking word for this sentence would be, letter B. because. This linking word is used to introduce or phrase or just simply expressing an explanation.