Concept:Simplify factorials using (n+2)!=(n+2)(n+1)!, then evaluate the limit.Explanation:Rewrite (n+2)! as (n+2)(n+1)!.Substitute into the given expression:(n+2)!−(n+1)!(n+2)!+(n+1)!=(n+2)(n+1)!−(n+1)!(n+2)(n+1)!+(n+1)!Factor out (n+1)! from numerator and denominator:(n+1)![(n+2)+1]Cancel (n+1)! to get:n+1n+3Now take the limit as n→∞:n→∞limn+1n+3=n→∞lim1+n11+n3=1Answer:1Correct option: C.