Who signed into law the act that provides $105 billion in funding for surface transportation programs?

Answer: C — Obama

The act that provides $105 billion in funding for surface transportation programs, known as the Moving Ahead for Progress in the 21st Century Act (MAP-21), was signed into law by President Obama in 2012. This legislation was significant because it aimed to address the nation's infrastructure needs, investing heavily in the improvement and maintenance of highways, transit systems, and other critical transportation facilities. The funding was designed to enhance transportation safety, improve public transit systems, and facilitate job creation in the construction and transportation sectors. In contrast, the other presidents listed were not responsible for this specific legislation. While they may have enacted various transportation programs, MAP-21 is specifically tied to Obama's administration, highlighting his focus on modernizing and sustaining America's infrastructure.