You work for the consumer insights department of a major big box retailer and you are investigating the efficacy of a new e-mail marketing campaign. Through the use of e-mail analytics research, you have determined that in a sample of 796 monitored subscribers, 122 of them opened the e-mail within 24 hours of receiving it. What is the 99% confidence interval for the true proportion of all e-mail subscribers that opened the e-mail within 24 hours of receiving it?

1) ( 0.1405 , 0.16603 )

2) ( 0.12356 , 0.18297 )

3) ( -0.12038 , 0.18616 )

4) ( 0.81384 , 0.87962 )

5) ( 0.12038 , 0.18616 )