Cash reserve Ratio (CRR) is the amount of funds that the banks have to keep with the RBI. If the central bank decides to increase the CRR, the available amount with the banks comes down. The RBI uses the CRR to drain out excessive money from the system.
The point of view in this excerpt is definitely third person, because nouns such as Dorothy, and pronouns such as she are used throughout to indicate third person.
However, if you also need to decide whether it is limited or omniscient, I'd choose limited - because we can only see what she is doing, and not what she is thinking and feeling.
B. could help give you confidence.
Although "the girls" is in plural form, "each of the girls", the subject, is in singular form.
Therefore, the correct answer is c. her, for it corresponds with the subject.
Hope this helps~