The value of $$\left( {{\text{1 + }}\frac{1}{x}} \right)$$ $$\left( {{\text{1 + }}\frac{1}{{x + 1}}} \right)$$$$\left( {{\text{1 + }}\frac{1}{{x + 2}}} \right)$$$$\left( {{\text{1 + }}\frac{1}{{x + 3}}} \right)$$is?

• A. $1 + \frac{1}{{x + 4}}$$
• B. + 4
• C. $\frac{1}{x}$$
• D. $\frac{{x + 4}}{x}$$