You got them on board to A/B test! And now they are curious for more: in multivariate testing, what are some possible factors you could test? Select all that apply.

Multivariate testing involves simultaneously testing multiple variables to see how different combinations affect a desired outcome. In Mailchimp, you can test elements within your email campaigns. Different subject lines are a common and effective factor to test, as they directly influence open rates. Similarly, different calls to action (CTAs) are crucial for engagement and conversions, making them excellent candidates for multivariate testing. The color of the recipient's mailbox and the internet speed of recipients are external factors beyond your control within Mailchimp's testing capabilities and are not elements you can manipulate or test in an email campaign.