Answer: Option 'C' is correct.
Explanation:
Length of garden = 5 feet
Width of garden = 6 feet
Width of walkway = 2 feet
So, Length of surrounding of walkway = 5 + 2 =7 feet
Width of surrounding of walkway = 6 + 2 = 8 feet
Perimeter of surrounding of walkway =

Hence, Option 'C' is correct.