Concept:The LET statement is used to store a value inside a variable.Explanation:In QBASIC, the LET statement assigns a given value to a variable.The keyword LET is optional and can often be omitted.For example, the statement LETx=10 assigns the value 10 to the variable x.This matches the purpose of assigning a value to a variable.Answer:A. allows users to assign a value to a variable.