In Mexico, "Race Day" is a celebration of:

A. Mexican Independence.
B. Mexico's cultural diversity.
C. Mexico's Spanish heritage.
D. Mexico's Catholic Traditions.

B. Mexico's cultural diversity.

B. Mexico's cultural diversity.

To find the answer to this question, we can start by researching "Race Day" in Mexico. A good starting point would be to search for information about Mexican holidays or celebrations. Let's look up each option to see which one aligns with "Race Day" in Mexico:

A. Mexican Independence: "Race Day" in Mexico is not traditionally associated with Mexican Independence. Mexican Independence Day is celebrated on September 16th each year.

B. Mexico's cultural diversity: "Race Day" in Mexico does not directly celebrate Mexico's cultural diversity. Although Mexico does have a rich cultural heritage, "Race Day" has a different focus.

C. Mexico's Spanish heritage: "Race Day" in Mexico does not directly celebrate Mexico's Spanish heritage. While Mexico has been influenced by Spanish culture due to its colonization by Spain, "Race Day" is not specifically tied to this aspect of Mexican history.

D. Mexico's Catholic Traditions: Based on the options given, "Race Day" in Mexico is most likely a celebration of Mexico's Catholic traditions. Mexico has a strong Catholic influence, and many religious holidays and traditions are observed throughout the country.

Therefore, the most suitable answer to the question is D. Mexico's Catholic Traditions.