The cultural significance of dominoes to people in the Spanish-speaking world can be best captured by option C: they are an important connection to the past.
Dominoes have deep historical roots in several Spanish-speaking countries and are often associated with family gatherings, socializing, and community bonding. The game serves as a way to preserve cultural traditions and values, connecting generations through shared experiences and memories. While options A, B, and D may have some relevance, the strong connection to cultural heritage is most prominently highlighted in option C.