GMAT Sentence Correction (SC) | If A then B may.....vs. If A then B will......vs. If A then B does/be

Before infusing A into B, processing may be necessary; Forexample, if the donor and thereceptor have the problem of blood incompatibility, the red blood cellsmay be removed to protect the transfusion reaction from occurring. Wrong.

Before infusing A into B, processing may be necessary; Forexample, if the donor and thereceptor have the problem of blood incompatibility, the red blood cellsare removed to protect the transfusion reaction from occurring. Right

It says "May be" is wrong
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