What is a cause and effect relationship that takes place in the Article? A. Because one of the snow surveyors was a photographer and another was a writer, one hiker did not view a snow survey as work.

B. Because government agencies depend on snow survey data, they are hiring more rangers, utility and water agency employees, and state workers.

C. Because some of the snow courses in the Sierra Nevadas cannot be reached by snow vehicles, the courses are not surveyed in January and February.

D. Because remote sensors installed in the 1970s do not provide reliable snow depths, humans are still needed to conduct snow surveys.

(plodding through power)