B) please no hand writing solution for other wise down vote

c. Because snow is an excellent insulator the temperature of snow-covered ground is near 0 C. Furthermore, the surface temperature of snow in a particular area does not vary much from one location to the next. Explain why a weak layer is more likely to form in places where the snowpack is not too deep. Choose the correct answer below. O A. A weak layer is more likely to form because, as the snowpack gets deeper, the temperature gradient gets smaller. O B. A weak layer is more likely to form because, as the change in temperature gets smaller the temperature gradient gets smaller. O C. A weak layer is more likely to form because, as the snowpack gets thinner, the temperature gradient gets larger. O D. A weak layer is more likely to form because, as the change in temperature gets larger, the temperature gradient gets larger.d. The term isothermal is used to describe the situation where all layers of the snowpack are at the same temperature (typically near the freezing point). Is a weak layer likely to form in isothermal snow? O A. No. If all layers of snowpack are the same temperature, then the change in temperature is zero and the temperature gradient is zero. O B. Yes. If all layers of snowpack are the same temperature, then the change in temperature is double and the temperature gradient is large. O C. No. If all layers of snowpack are the same temperature, then the change in temperature is double and the temperature gradient is large. O D. Yes. If all layers of snowpack are the same temperature, then the change in temperature is zero and the temperature gradient is zero.dT Avalanche forecasters measure the temperature gradient dh . which is the rate at which the temperature in a snowpack T changes with respect to its depth h. A large temperature gradient may lead to a weak layer in the snowpack. When dT these weak layers collapse, avalanches occur. Avalanche forecasters use the rule of thumb that if dh exceeds 10 C/m anywhere in the snowpack, conditions are favorable for weak-layer formation, and the risk of avalanche increases. Assume the temperature function is continuous and differentiable. Complete parts (a) through (d) below