If Andrew got a loan of K7000, and he was charged 20% for 2 year repayment, how much will he pay altogether?

The formula for simple interest is $I = P \times R \times T$, where $P$ is the principal amount, $R$ is the annual interest rate, and $T$ is the time in years.

$$I = \text{K}7000 \times 0.20 \times 2$$ $$I = \text{K}1400 \times 2$$ $$I = \text{K}2800$$

The total interest charged is K2800.

The total amount is the principal amount plus the interest.

$$\text{Total Amount} = \text{Principal} + \text{Interest}$$ $$\text{Total Amount} = \text{K}7000 + \text{K}2800$$ $$\text{Total Amount} = \text{K}9800$$

Andrew will pay K9800 altogether.

The correct option is D.

$$\boxed{\text{D. K9800}}$$