The correct answers for formatting in-text citations in MLA style are:
B. Inside the closing period
C. In brackets
D. In parenthesis
In MLA style, in-text citations should be placed inside the closing period of the sentence, and they are typically formatted in parentheses. The term "brackets" may be confusing here; in MLA, "parentheses" is the correct term for the citation format. If you intended to include "in parentheses," then options B, D, and the reference to "brackets" (interpreted as "parentheses") can be considered correct in this context.