Which is an example of a Python naming rule for a variable? (a)Use numerals 1-100

(b)Begin with a lowercase letter or underscore

(c)End with a punctuation symbol

(d)Use spaces between words

Look at this photograph of a klondike gold rush camp. what would you find challenging about being in this type of environment? check all that apply. the extreme cold the steep climbs over the mountain the thick covering of snow the cramped living conditions the harsh winds