The correct option is
C Few
Let us identify the noun in the sentence.
The noun is 'words'. It is a plural countable noun.
Now let us look at the usage of each of the options.
Option A 'More' - More is used for comparison. It tells the reader whether some quantity is greater than the other.
In this sentence, there is no comparison being made. So that means 'More' isn't the right answer.
Option B 'Much' - Much is mainly used in negative and interrogative sentences.
In this sentence, there isn't a 'not' which makes the sentence positive. So, 'Much' isn't the right answer.
Option C 'Few' - Few is used with plural countable nouns. So that makes it the right fit for the answer, as 'words' is plural countable noun.
Option D 'Little' - Little is used with uncountable nouns. here 'words' is countable.
That leaves us with Option C as the right answer.