Calculate the Selling Price (SP) based on the Cost Price (CP) and profit percentage.

The shopkeeper gains 33% profit.

$$\text{SP} = \text{CP} + 0.33 \times \text{CP} = 1.33 \times \text{CP}$$

The shopkeeper gives a 5% discount on the Marked Price.

$$\text{SP} = \text{MP} - 0.05 \times \text{MP} = 0.95 \times \text{MP}$$

$$\text{MP} = \frac{1.33}{0.95} \times \text{CP}$$ $$\text{MP} = \frac{133}{95} \times \text{CP}$$ $$\text{MP} = 1.4 \times \text{CP}$$

The percentage above CP is given by $\frac{\text{MP} - \text{CP}}{\text{CP}} \times 100\%$.

$$\text{Percentage above CP} = \frac{1.4 \times \text{CP} - \text{CP}}{\text{CP}} \times 100\%$$ $$\text{Percentage above CP} = \frac{0.4 \times \text{CP}}{\text{CP}} \times 100\%$$ $$\text{Percentage above CP} = 0.4 \times 100\%$$ $$\text{Percentage above CP} = 40\%$$

The article must be marked 40% above the Cost Price.

The correct option is 2.
The final answer is \text{40%}.