The daily sales (in ₹ thousand) of a kiosk last week were 8, 12, 12, 15, 18, 20 and 20. If an additional day with sales of ₹20 thousand is included, what will happen to the range of the data?
(a) It will decrease by ₹4 thousand.
(b) It will increase by ₹2 thousand.
(c) It will remain the same.
(d) It will become ₹0 thousand.