The correct answer is A. 13.2%.
The total order conversion rate is the ratio of the total number of orders to the total number of clicks, expressed as a percentage. To calculate the total order conversion rate, we need to sum up the clicks and orders from all the channels, and then divide the orders by the clicks and multiply by 100.
Using the data from the table, we can do the following:
Total clicks = 580 + 800 + 1,200 + 300 + 620 = 3,500
Total orders = 55 + 100 + 220 + 60 + 85 = 520
Total order conversion rate = (520 / 3,500) x 100 = 14.857%
Rounding to one decimal place, we get 14.9%
Therefore, the total order conversion rate is 14.9%.