Choose the right option. My sister has got ____ dolls.

The sentence requires a determiner that quantifies a plural countable noun ('dolls'). 'Few' and 'a few' are used with plural countable nouns to indicate a small number. 'Few' implies not many, while 'a few' implies a small but sufficient number. 'Much' is used with uncountable nouns. 'A little' is used with uncountable nouns. Given the options, 'few' or 'a few' would be grammatically correct. Without further context to imply a positive or negative connotation, 'few' is a common choice for a simple statement of quantity. However, 'a few' is also a valid and common choice. The provided options include 'few' and 'a little'. 'A little' is incorrect as 'dolls' is countable. 'Much' is incorrect as 'dolls' is countable. Between 'few' and 'a little', 'few' is the correct choice for countable nouns. If 'a few' were an option, it would also be correct. Based on the options provided, 'few' is the most appropriate choice to fill the blank, indicating a small number of dolls.