Here is a table summarizing paid search data for five keywords. Given this information all of the following statements are true, EXCEPT... Keyword Impressions Clicks Transactions Cost A 100,000 6,000 60 $7,200 B 50,000 5,000 120 $3,000 800,000 4,000 24 $1,200 D 50,000 3,000 15 $6,000 E 800,000 2,000 8 8 $5,000 From a click through rate perspective, keyword B is the most effective From a cost per click standpoint, keyword C is most efficient O From both an effectiveness and efficiency standpoint, keyword E is the weakest keyword Across the five keywords, the weighted average cost per click is higher than the unweighted average cost per click