Fill in the blanks with correct option.
Even on an overcast winter’s day, it is at least 10 times _____ outside than in a standard office. By _____ to work and getting outdoors at lunchtime, we can begin to reconnect with the light.

Options

A. i) Brightest, walking
B. ii) Brighter, walking
C. iii) Bright, walk
D. iv) Brighter, walk

Explanation

Brighter, walking In the given sentence, the comparison is done between the temperature inside the office and that of the outside. The first blank should be a comparative degree, so brighter is used. In the second blank, By should be followed by “Verb I + ing”