Ayesha can complete a piece of work in 16 days. Amita can complete the same piece of work in 8 days. If both of them work together in how many days can they complete the same piece of work ?

• A. ${\text{4}}\frac{2}{5}{\text{ days}}$$
• B. ${\text{5}}\frac{1}{3}{\text{ days}}$$
• C. ${\text{6 days}}$$
• D. ${\text{12 days}}$$