AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
Calendars were used even by people who could not read, and were displayed year-round in homes, tea shops, and offices, forcing viewers to see the advertisement daily throughout the year.
Source: The Age of Industrialisation, Section 6 – Market for Goods
The examiner wants two linked points: (1) calendars reached illiterate audiences (unlike newspapers/magazines), and (2) they provided continuous, year-long exposure. Both points together explain the unique effectiveness. Mentioning only one will likely lose the mark. Keep the answer to one sentence or two very short phrases.