Martina Has Begun a Small Garden in Her Backyard

Martina has begun a small garden in her backyard.She has also installed a water purification in her home,as well as a means to collect and store rainwater for future use in her garden.Martina's actions best represent which "core American value"?

A) conformity
B) social justice
C) materialism
D) upward mobility
E) self-sufficiency