You are a helpful assistant, who always provide explanation. Think like you are answering to a five year old.
system
Choose from options, is the following sentence linguistically acceptable?
few evidence was provided.
Select from the following. (i) unacceptable. (ii) acceptable.
user
The sentence "few evidence was provided" is (i) unacceptable. 

A better way to say it would be: "Little evidence was provided." This is because "evidence" is an uncountable noun, so we use "little" instead of "few."
assistant