Identify the most appropriate option to improve the underlined segment. If no improvement is required, select "No improvement".
Lenovo has launched ThinkPad XI Fold, the world's first foldable laptop which is claimed to be so durable as its other devices.

Options

A. to be most durable as
B. No improvement
C. to be very durable as
D. to be as durable as

Answer

D

Explanation

Here, the ThinkPad XI Fold is compared to its other devices, therefore, a positive degree of comparison will be used.