E-mail subject lines with characters produce the highest read rates.
A. more than 80
B. between 40 and 51
C. between 15 and 25
D. fewer than 10
E. between 61 and 70
E-mail subject lines with characters produce the highest read rates.
A. more than 80
B. between 40 and 51
C. between 15 and 25
D. fewer than 10
E. between 61 and 70
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