Final answer:
Option B: One such effort took place in April 1943 in Poland’s Warsaw ghetto. correctly fixes capitalization errors in sentence 2 by capitalizing 'Warsaw ghetto'.
Step-by-step explanation:
The correct answer choice that fixes the capitalization errors in sentence 2 is option B: One such effort took place in April 1943 in Poland’s Warsaw ghetto. In this sentence, 'Warsaw Ghetto' should be capitalized because it is the name of a specific place. Capitalization is used for proper nouns, which include the names of specific people, places, organizations, etc. By capitalizing 'Warsaw ghetto', option B fixes the capitalization errors in the sentence.