Adding Uncertainty to Future Consumption Will Tend to Increase Savings $U ^ { \prime \prime } > 0$

Adding uncertainty to future consumption will tend to increase savings providing:

A) $U ^ { \prime \prime } > 0$ .
B) $U ^ { \prime \prime } / U ^ { t } > 0$ .
C) $U ^ { \prime \prime } / U ^ { t } < 0$ .
D) $U ^ { \prime\prime\prime} > 0$ .