What aspect of advertising might contain essential information about terms and conditions?

The correct choice focuses on "fine print," which is typically where advertisers include important details regarding terms and conditions. Fine print usually contains specifics that can include legal disclaimers, eligibility criteria, limitations, and other essential information that might not be immediately obvious. This section is crucial for consumers as it ensures that they are fully informed about what they are agreeing to when engaging with the advertisement, such as terms of a sale or the conditions of a promotional offer.

The other options do not serve this purpose effectively. Bold print is often used to highlight key messages or important points that advertisers want to draw attention to, but it does not necessarily include detailed terms. Clear print may refer to legibility and readability but does not specifically relate to the inclusion of terms and conditions. Illustrative print focuses more on visual elements and imagery in advertising rather than the textual information about conditions and terms.