C

To find the required configuration of the capacitors for a specific total capacitance, we need to use the formulas for capacitors in series and parallel connections.
Step 1: Identify the total capacity of the seven capacitors, each with a capacity 'C'.
Step 2: The total capacitance of capacitors in series (n capacitors) is given by:
$$ C_{total} = \frac{C}{n} $$
In parallel, it's given by:
$$ C_{total} = C \times n $$
Step 3: Since we have seven capacitors, we can distribute them in series and parallel configurations to achieve the desired total capacitance.
Step 4: After evaluating the options provided, we find that Option C demonstrates a necessary arrangement that can yield the desired total capacity combining both series and parallel connections effectively.
Therefore, the correct answer is C.