The BRAC anti-poverty program in Bangladesh gave poor families training on how to raise livestock, a savings account, and help with their physical and mental health. These policies can potentially improve economic growth by increasing  a. education, savings, and human capital, respectively.  b. physical capital, savings, and natural resources, respectively.  c. property rights, research and development, and human capital, respectively.  d. education, research and development, and natural resources, respectively.