Final answer:
The statement "Stand for Equality and Justice" on a billboard best aligns with gender equality, which is about providing equal rights and opportunities regardless of gender and is part of the wider human rights movement against discrimination.
Step-by-step explanation:
A billboard with the statement "Stand for Equality and Justice" supports social issues or political ideas that are often associated with the protection and promotion of human rights and the fight against discrimination. Among the options provided, gender equality (b) aligns most closely with the idea of standing for equality and justice. Gender equality represents a societal and political struggle to provide the same rights, responsibilities, and opportunities to all genders. The Human Rights Campaign, advocating for LGBTQ rights, is an example of an organization working toward these goals, focusing on campaigns like Americans for Marriage Equality to highlight the importance of equal rights under the law for all couples regardless of gender. This includes addressing the legal status of issues such as gay marriage and fighting against continuing discrimination, such as debates around facilities access for transgender individuals.